Disclaimer: I do not own Smallville, Arrow, The Flash, DC's Legends of Tomorrow, or any of their characters.

A/N: This story takes place in an AU where the Tachyon prototype device sent Barry to the Smallville Universe instead of Supergirl's Earth, which can be read in "Worlds Finest: Hero of Another World". In this story, instead of Earth-38 Supergirl, Smallville's Superman, Superboy, and Green Arrow assists the Arrowverse crew in the battle against the Dominators.


Chapter 1

Earth-1, Central City

"Since we've learned of them, we've been calling them the Dominators," Lyla was explaining to Barry and his team the aliens that had crash-landed on Earth hours ago. Everyone was gathered in the cortex of S.T.A.R. Labs.

"That is not the name of a species that comes in peace," Wally noted.

"No, no, it's very aggressive," H.R. agreed.

"So, how long have you guys known about these Dominators?" Iris asked.

"Since the '50s," Lyla answered.

"That was them," Joe said, pointing to the large flat-screen that showed information about the Dominators. "Redmond, Oregon. The government tried to cover it up." As Joe noticed everyone looking at him, he added, "What? I watch Sci-Fi channel."

"In 1951, they appeared under the same sort of circumstances," Lyla continued. "A ship crash-landed. Little to no communication. We learned they were abducting humans to gather intel about us. They attacked, and hundreds of soldiers lost their lives. Then, for some inexplicable reason, they left. All contact had been lost until three months ago when the DOD received this."

She pressed a button on the remote control in her hand, then an audio clip started playing on the flat-screen. We pose no threat, human inhabitants. The alien voice of a Dominator announced on the audio. Understanding is our purpose. Any action against us, as shown to us in the past, will prompt swift retaliation.At that point, the audio clip ended.

"So, when we discovered four ships heading towards Earth, we were concerned that it was happening all over again," Lyla said. "One of them, obviously, landed here."

"Right, 'cause we ain't got enough crazy going on here in Central City," Joe remarked.

"Do you know what they want?" Caitlin asked.

"They've ignored all attempts to communicate," Lyla said. "But we do know, just like before, that the dropships contain reconnaissance teams sent here to gather more intel about us."

"Looking for our weaknesses," Joe added.

"We need to do something," Wally said.

"We are," Lyla said. "Nearly every member state in the UN is in talks to coordinate a response. Action is being taken."

"So, wait, you want us to just sit this one out?" Iris asked.

"These things are like World War Z zombies," Barry added. "If they decide to attack, no military can stop them."

"Neither could you," Lyla countered. "Not by yourself anyway. Just let us handle this. For now. I'll be in touch."

With that, she exited the cortex.

Wally turned to Barry and said, "So, the plan isn't to just stay still and do nothing, right?"

"No," Barry answered.

"Barry, you heard Lyla," Iris said. "You can't do this alone."

"I don't plan to," Barry said.


"What is this place?" Thea asked, as she and Barry walked over to where Cisco, Felicity, and Diggle were standing. After Barry had run all the way to Star City to get Team Arrow's help, everyone decided to gather at the S.T.A.R. Labs hall hangar.

"Uh, it's this old hall hangar thing that S.T.A.R. Labs owns," Barry answered. "Or, I guess, I own it."

"Well, you should do something with it," Thea suggested.

"All right, so let me get this right," Diggle said. "Our time-traveling buddies in a flying time ship are supposed to just pop up right here, right?"

"Yeah, this is the time and place I gave them," Felicity answered. "So if they got my message, they should be here..."

As if on cue, accompanied by a brilliant flash of light, the Legends' jump-ship suddenly appeared in the sky out of thin air.

"...right now," Felicity finished, pointing up to the jump-ship as it swooped down towards her and the others.

"You know why I've never done drugs?" Diggle remarked, as the time ship prepared to land. "It's because I was always afraid I'd see weird stuff."

"Okay, uh, take everybody inside, all right?" Barry said to Felicity. "Tell Oliver I'll be right back."

"Where are you going?" Thea asked.

"Well, since we're fighting aliens, I figured we should get one of our own, right?" Barry pointed out. He turned to Cisco. "You found the right Earth?"

"Tachyon device tracked you on Earth-21 when you met him," Cisco explained. "So you should find him there."

"All right," Barry said.

"Just so you know, I'm only doing this because we're on a mission," Cisco sternly said. He was upset with Barry, whom he blamed for his brother Dante's death, since it was Barry's creation and later undoing of the Flashpoint timeline that had indirectly caused what happened to Dante. "I'm not gonna let my issues with you get in the way of that."

Barry nodded, as Cisco put on his vibe goggles. Cisco held his arm out with his hand closed into a fist. His fist then started glowing with bright blue energy as Cisco started opening a breach. "This might take a few tries," he said to Barry.

Barry grabbed Cisco and super-sped them into the breach.


Earth-21, Metropolis

Barry and Cisco emerged from the other end of the breach to find themselves inside an apartment.

Looking around with a bit of confusion, Cisco took off his goggles. "This better be the right place," he said, unsure as to whether or not they'd gone to the right Earth or even left Earth-1 at all. "Because if this isn't the right place, someone's about to be real confused."

Behind them, the apartment door opened and a tall, dark-haired man with glasses in a mild-mannered reporter's attire entered. The man immediately paused in surprise at the sight of the two guys standing in his apartment, one of whom he instantly recognized.

"Barry?" the man asked, frowning.

"Hey, Clark," Barry greeted.

"What are you doing here?" Clark asked, pushing his glasses a little. "Not just inside my apartment, but here on this Earth."

"It's a long story," Barry said. "Actually, it took us a couple of tries to get here. This is my friend Cisco."

"Well, 'friend' is a loose term," Cisco corrected. "We work together. I'm Cisco."

"Clark Kent," Clark said, as he and Cisco shook hands.

"I have to say it, this is a nice universe you got here," Cisco commented.

"Thanks," Clark said. "But believe me, it's not always as nice as it may seem at first glance." He turned to Barry. "But I'm sure you didn't run all the way back to this corner of the multiverse just to chat."

"You're right," Barry said. "Okay, do you remember last year when I helped you and your team defeat several meta-humans, and you promised to help me out in return one day if I ever needed it? Well, that day is today."

"Sure," Clark nodded. "Just tell me what it is you're up against and you can count me in."

"Believe it or not, what we're up against is an alien invasion," Cisco explained.

"We came here because I figured you would be the best candidate for helping us deal with this threat," Barry added. "To be honest, actually, we can kinda use all the help we could get. Any chance you can contact some of the other members of your, uh, Justice League?"

"I'll call Oliver and Conner," Clark suggested. "Have them meet us at Watchtower."

"Oliver?" Cisco repeated. "That wouldn't happen to be 'Oliver' as in Oliver Queen, would it?"

"Yeah," Barry nodded. "He's the Green Arrow here too. And he looks different from our Oliver."

Cisco glared at Barry, then pointed to Clark. "I was asking him."


Barry and Cisco followed Clark, who was now wearing in his Superman suit, into the Watchtower base.

"What are we dealing with this time, Clark?" Oliver immediately asked, walking towards the three. He was already in his Green Arrow gear, a compound bow clutched in his hand.

"Barry and Cisco here need our help stopping some aliens who have arrived on their Earth," Clark explained.

"Aliens? Oh, so it's one of those missions," Oliver said. "I guess now's my chance to try out my newest compound bow on something a little more powerful than just simple street thugs."

"Let me guess, you're this universe's Oliver Queen?" Cisco asked, remembering what Barry had told him.

"I am," Oliver answered. "And you're Cisco. Clark just said your name."

"Yeah, Cisco Ramon," Cisco answered. "Well, this is a first. Meeting a non-doppelganger alternate counterpart of someone we know from our Earth."

"Yeah, your friend Barry did mention the last time he was here that all of our other selves have different appearances in your world," Oliver said.

Suddenly, there was a whooshing sound and a young man dressed in a black T-shirt with the red House of El emblem printed on his chest and blue jeans appeared in the base.

"I got your message to meet you here, Clark," Conner announced. "What's the emergency?" He then noticed Barry. "Oh, hey... it's Barry, isn't it? You're that speedster guy we met last year, the one from a different Earth."

"That's right," Barry nodded. "I'm back because we need you guys' help. Are you in?"

"Um, sure," Conner answered. "I got nothing else better to do."

"Okay, cool," Barry said. "Now let's get back to our Earth and start introducing you three to everybody."

Cisco held his arm out and opened a breach again.

"That's the portal that's gonna get us to your world?" Oliver asked, intrigued by Cisco's meta-human ability.

"We call them breaches," Cisco said. "And yeah, all you do is walk through it and you're there."

"That easy, huh?" Oliver said.

"That easy," Cisco answered.

Barry, Cisco, Clark, Oliver, and Conner headed through the breach to the former two's universe.


Earth-1, Central City

Felicity was taking the attendance of everyone who was present inside the hangar. "Team Arrow is here," she noted, pointing to Oliver, Diggle, and Thea. "Team Legends is here," Felicity added, pointing to Sara, Professor Stein, Jax, Mick, and Ray.

Felicity then approached H.R. and asked, "Is that everyone?"

"I think so," he answered, uncertain.

"Nate and Amaya are back watching the Waverider," Sara said to Felicity. "The newbies."

Suddenly, a breach opened and everyone watched as Barry, Cisco, a tall, well-built man in a mostly blue skin-tight suit with a red cape, a younger man in a black T-shirt and blue jeans, and a green-clad man with spiky blonde hair who appeared to be an archer emerged from it.

"Whoa," Conner muttered. "That was so cool."

"Guys, thanks for coming," Barry said to those who were from Earth-1.

"Barry, I thought you were bringing an alien," Earth-1 Oliver said. The three strangers with Barry and Cisco – two who were in outfits with some sort of ridiculous-looking 'S' symbol printed on their chests, while the other one, clearly an archer, was in a sleeveless green leather uniform that was designed differently than his own Arrow gear – looked nothing else but human.

"And yeah, we did," Barry said, gesturing towards Clark and Conner. "Uh, we brought two, actually. Everybody, these are my friends, Clark Kent and Conner Kent, or as they're known on their Earth, Superman and Superboy."

"Who's the archer?" Oliver asked.

"Also, everybody, believe it or not, this is, um, this is Oliver Queen, aka Green Arrow, from Earth-21," Barry added, glancing at the man in question and causing most of the heroes to roll their eyes in disbelief.

Thea, in particular, burst out in skeptical laughter. "That's very funny, Barry."

"Barry, what is this supposed to be, a joke?" Earth-1 Oliver asked, not amused at all.

"It's not a joke, Oliver, believe me," Barry assured him. "Look, everybody, I know how crazy it sounds, and I know he looks different than the Oliver we all know, but this guy who came through the breach with us really is Oliver Queen. Well, he's an Oliver Queen, one who is from a parallel Earth."

"A parallel Earth?" Diggle repeated, incredulously.

"Yes, Dig, they exist," Barry answered. "And Superman, Superboy, and this Oliver are from one."

"I believe you, Barry," Felicity said. "I believe you completely."

"Thank you, Felicity," Barry said, smiling. "That makes at least one of you."

"Try two of us," Iris corrected. "I believe you too, Barry."

"I got a question," Jax announced, his mind focusing on the two Kryptonians. "What makes Superman and Superboy so super?"

"And is it just me or does the red and blue Boy Scout with the cape look a little like Haircut?" Mick commented, causing Ray to frown at him.

Before anyone else could ponder over Mick's remark, Clark and Conner levitated, then Clark activated his heat vision and burned the House of El symbol, which was the same as the emblem on his and Conner's chests, into the hard floor.

"I'm convinced," Diggle said, stunned. As if the appearance of a second Oliver Queen, who looked like a completely different person no less, wasn't enough...

"Best team-up ever!" Felicity exclaimed, with child-like enthusiasm.

Clark and Conner landed back on the ground. Preparing to learn everyone's names, they and their Oliver approached the Earth-1 Oliver.

"So you're the Oliver Queen, or should I say Green Arrow, of this world," Clark said.

"Yes, that would be me," Earth-1 Oliver answered. Although a part of him still didn't feel a hundred percent convinced that the other emerald archer was, indeed, a non-identical version of himself from another Earth, he also knew Barry long enough to realize that he wouldn't just make up such a tale, especially not during a situation as dire as an alien invasion.

"You know, Barry told me you had a different face from me on this Earth," Earth-21 Oliver said. "And judging by the fact that you seem to be taking this nonchalantly, I'm guessing you've seen just as many not-so-normal things as I have over the years."

"I've seen enough to the point where very little surprises me anymore," Earth-1 Oliver said.

"Same here," Earth-21 Oliver nodded. "Guess we can compare notes and talk more about ourselves later?"

Instead of responding, Earth-1 Oliver simply gave his counterpart a stern look.

Next, Clark, Conner, and Earth-21 Oliver approached the well-built black man standing beside Earth-1 Oliver.

"And you would be..." Clark asked.

"John Diggle, codename Spartan," the man introduced himself. "But you guys can call me Diggle or Dig. Either one is fine."

The three Earth-21 heroes nodded, then approached the young woman who couldn't be more than twenty or maybe twenty-one years old.

"And you?" Clark asked.

"Thea Queen, codename Speedy and brother of Oliver Queen," she introduced herself.

Earth-21 Oliver's eyes widened. "Brother?"

"Yeah," Thea replied. "If you're a version of Ollie from another Earth, shouldn't there be another version of me too?"

"I'm an only-child actually," Earth-21 Oliver answered, much to Thea's surprise. "I guess that's another difference between our worlds. Although I did have a sidekick who, like you, went by the codename Speedy for a while until she decided to hang up her hood and give up crime-fighting. But she isn't related to me, though. Her name is Mia Dearden."

Thea's eyes widened. "Mia Dearden?"

"You know that name?" Earth-21 Oliver asked.

"Are you kidding me? Dearden is my middle name," Thea explained. "And I once used the name 'Mia' as an alias. Are you sure your Speedy isn't related to you?"

"Positive," Earth-21 Oliver nodded. "You see, the thing is, Mia and I may not share blood, but she sure as hell is the closest thing I've had to a younger sister."

A smile crept on Thea's face. "So I do exist on your Earth in some way then."

"Yeah, I guess so," Earth-21 Oliver nodded.

"You know, five years ago, I never would've guessed that my life would ever get this weird," Thea commented. "Meeting another version of my brother who doesn't look like my brother."

"If you ask me, I think they should just drop the word 'weird' from all dictionaries since it seems to have the same meaning as the word 'normal' nowadays," Earth-21 Oliver remarked.

"I know, right?" Thea chuckled.

With that, the Earth-21 heroes headed over to the blonde woman who appeared to be in her late twenties.

"You?" Clark asked.

"Sara Lance, codename White Canary," the blonde woman answered.

"Any relation to a Dinah Lance who may or may not have become the vigilante known as Black Canary on this Earth?" Clark asked.

"My sister Dinah Laurel Lance was the Black Canary until she was brutally murdered by a deranged, magic-wielding psychopath," Sara explained, traces of sadness in her voice.

Conner gasped in surprise. "Wait, Dinah's dead on this Earth?"

"If you're referring to my sister and not my mother, whose first name is also Dinah, then yes," Sara said, with a sigh.

"I'm sorry to hear that," Earth-21 Oliver apologized to Sara. From the sound of his voice, it was clear he was a bit saddened by the news of Laurel's premature death, even though she wasn't his Dinah Laurel Lance/Black Canary, who was still alive and well in his world.

"Don't be," Sara said. "The only person who should be sorry is Damien Darhk." The Earth-21 heroes didn't fail to notice the obvious anger evident in the white-clad assassin's voice especially as she'd spoken the name of the one person she hated with every fiber of her being.

Moving on, Clark pointed to the young black man standing behind Sara. "And what about you?"

"Jefferson Jackson, one-half of Firestorm," the young man replied. "But people usually call me Jax."

Clark nodded, then pointed to the older man with gray hair and glasses.

"Professor Martin Stein, the other half of Firestorm," he answered.

After nodding once more, Clark pointed to the bald guy beside Stein. "And what would your name be, sir?"

"Hmm?" Mick looked up at Clark. "Oh, Mick Rory, codename Heatwave."

Clark then moved on to the guy who somewhat bore a resemblance to himself. "What about you?"

"Ray Palmer, codename The Atom," he answered.

"We had an Atom on our Earth too," Clark said. "A long time ago. His name was Al Pratt."

"Al Pratt," Ray repeated. "Doesn't ring a bell. I don't suppose the name Raymond Palmer happens to ring a bell to you guys, does it? If there's an Oliver Queen in your universe, surely there must be a me who exists there as well."

"I can't say that I've heard of anyone with your name," Clark said.

"I can't either," Earth-21 Oliver added. "Sorry."

The three Earth-21 heroes turned around and headed over to the three women they hadn't yet acknowledged. Clark pointed to the blonde with glasses.

"Felicity Smoak, codename Overwatch," the blonde woman said. "Hello," she added, smiling and staring attractively at the three men before her. She turned to Earth-21 Oliver. "I guess the preference to don green leather with a hood while wielding a bow and arrow is a major constant of all the Oliver Jonas Queens across the entire multiverse. Jonas is still your middle name, right?"

"Just as it says on my birth certificate," Earth-21 Oliver answered, smiling.

"Well, it's nice to meet you, uh, Oliver," Felicity said. "Oh, my God, this is awkward! It's like I'm meeting Oliver Queen for the first time all over again, except you don't look like Oliver Queen. Well, technically, you do look like Oliver Queen, since you're an alternate version of him from a parallel Earth. But what I really meant to say is that you don't look like this Earth's Oliver Queen. You know, the man I've worked alongside for the last five years."

"Right," Earth-21 Oliver nodded, taken aback by Felicity's characteristic babbling. He'd only just met her, but he could already tell that this woman was even more upbeat and adorkable than his wife Chloe.

The three Earth-21 heroes then turned to the dark-skinned woman standing beside Felicity.

"Iris West, boyfriend of Barry Allen," she introduced herself.

Lastly, Clark and his two teammates approached the brunette who was sitting down at the computer. "And you?" he asked.

"Dr. Caitlin Snow," she answered.

Nearby, Iris walked up to her boyfriend. "Uh, Barry, so, Oliver Queen is the Green Arrow?" she asked, surprised.

"Yeah," Barry answered.

"Oh, my God, he just got so much hotter," Iris commented, glancing over at Earth-1 Oliver, then doing the same to the Earth-21 version. "Both of them," she added with a smile.

"Oh, my God," Barry muttered, an obvious note of jealousy in his voice.

"Okay, Cisco, we should probably get started," Earth-1 Oliver suddenly announced.

Cisco switched the large flat-screen to an image of a Dominator roaming around in a wooded area.

"Wait," Thea said, as a realization crossed her mind. "Since there are two Oliver Queens apparently, how are we gonna address each of them? It will be quite confusing if we just called them both Oliver."

"How about 'Oliver One' and 'Oliver Two'?" Conner suggested, causing most of the heroes to roll their eyes at him.

"I got a better idea," Sara said, matter-of-factly. "One Oliver could be 'Ollie' and the other could be just 'Oliver'."

"I'll be 'Oliver' and he can be 'Ollie'," Earth-1 Oliver said.

"Fair enough," Earth-21 Oliver agreed.

"Now that we've got that cleared up, I guess I'll get started," Barry announced, looking up at the screen. "Okay, um, these are the Dominators. We don't know much about him."

"Except they are equipped with incredible strength and technology far more advanced than anything on Earth," Clark added, having learned of the Dominators during his training with Jor-El in the Fortress years ago. "They also prefer to work behind the scenes, and there's the fact that they came to my planet Krypton before I was born." He didn't fail to notice the suspicious glance Earth-1 Oliver threw at him, but decided to ignore it. "On Krypton, they did experiments on a lot of people, but killed twice as many. If the Dominators of this universe are anything like the ones in ours, we have a serious threat on our hands."

"Well, they're not the only ones with superhuman strength, I hear," Thea pointed out. "Barry says you and Superboy are more powerful than a locomotive."

"Actually, for Clark, it goes far beyond just the locomotive," Conner said. "I have yet to perform such a feat, but Clark once hurled a planet the size of Saturn back into space as it was coming down towards Earth."

"Wait, he did what?!" Thea gasped in utter disbelief, more surprised by that revelation than having met an alternate, non-identical version of her half-brother, which she was still having trouble wrapping her head around.

Clark threw a glare at Conner, not comfortable with the latter sharing such info with strangers from another universe. Not even Barry had been made aware of that extent of Clark's strength.

"A planet the size of Saturn?" Jax asked, also in disbelief. "Dude, that's some serious shit right there."

Stein glared at Jax. "Watch the language, Jefferson."

"If you could lift an entire planet, then how do you get around without causing damage to whatever you come into physical contact with?" Ray asked Clark. "I mean, Earth is much smaller than Saturn, so..."

"We should use Clark and Conner as stand-ins for training," Earth-1 Oliver abruptly suggested.

Ollie turned to his other self. "What? You can't be serious."

"Yes, I am," Oliver sternly said.

"Well, no offense to you and your merry band of heroes of this Earth, but trust me, none of you will stand a chance against one Kryptonian, let alone two," Ollie pointed out. "You haven't seen the half of what Clark and Conner are capable of."

"We've already seen them fly and your friend Clark fired what looked like fire beams from his eyes," Oliver countered, looking his counterpart firmly in the eyes. "And if it's true he's capable of lifting a planet the size of Saturn, I'd say we've seen and heard enough already."

"Hey," Mick spoke up. "Since when was Robin Hood calling the shots?"

"Which Robin Hood?" Jax remarked. "Anyway, what I think Mick is trying to say is it would be nice if we knew who was in charge around here."

"Maybe we should take a vote," Ray suggested, raising his hand. "Choose a leader. Someone we can all trust."

"Well, I trust Oliver," Cisco said, partially hoping to cause Barry to feel bad. "He's got my vote."

"Appreciate that, Cisco, but Barry put us all together," Oliver pointed out. "It should be him."

"Fair enough," Cisco agreed, reluctantly.

"Or what about Clark?" Conner suggested, raising his hand and causing all eyes to focus on him. "Maybe he can be our leader. I mean, if anyone has a ton of experience when it comes to fighting powerful aliens, it's him."

"It's okay, Conner," Clark said. "Oliver, their Oliver, is right. Like he said, Barry was the one who brought all of us together and it should be him. Besides, they've just met me while they obviously have known Barry for quite a while now."

"Good point," Conner said. Glancing over at the speedster, he added, "So Barry it is then."

"Okay, um," Barry began, "cool, all right, well, I guess as team leader, first thing to do is start out by, um..."

"Doing a test run," Oliver muttered, suggestively.

"Let's do a test run," Barry continued. "Yeah, let's do a test run, um..."

"Against Superman and Superboy," Oliver muttered once more.

"Against Superman and Superboy, all right?" Barry continued. "Test run against Superman and Superboy."

"Are we just supposed to pretend like we don't hear him?" Sara asked, referring to Oliver not-so-subtly telling Barry what to say.

Thea couldn't help but grin at Sara's question.

Ollie turned to Oliver. "Hey, if you're gonna put your team up to this, well, don't you at least think maybe it should be against either Clark or Conner instead of both of them?"

"We need to make sure each and every one in here understand this isn't gonna be easy," Oliver stubbornly said. "If you really are me, and if our lives were remotely similar, you should understand exactly where I'm coming from."

"One thing I am starting to understand are the not-so-subtle differences in our attitudes," Ollie remarked.

"Not that I know anything about the life you've led wherever you come from, but here, my attitude is what kept me alive all these years," Oliver countered.

"Let me tell you something, Grumpy Pants, there's nothing wrong with lightening up a bit every once in a while," Ollie said, causing several people to burst out in laughter.

"An Oliver Queen with a sense of humor," Ray remarked. "There's something different."

"Our Oliver had his moments," Sara said. "Particularly, before the island."

"I'll do the test run," Clark volunteered, looking over at the Earth-1 emerald archer. "Oliver, my Oliver, has a point. Given how powerful Conner and I are, one of us should be good enough."

"All right," Oliver gave in, something he clearly wasn't used to doing. "Test run against Superman only then." He turned to Barry. "Tell them, Barry."

"You guys heard the man," Barry announced. "Test run against Superman only. So just, uh, suit up, okay? Look alive. We're training to fight aliens by fighting an alien, so..."

"Do it!" H.R. exclaimed.

"...suit up," Barry concluded his sentence. He turned to H.R. "Stop."

"What?" H.R. said.

The heroes headed off as they began to prepare for the mission.

"Oliver," Barry called out. "Both of you. Hey, Clark, Conner."

Oliver, Ollie, Clark, and Conner turned around and headed back over to Barry.

"Um, really quick," Barry continued. "I was excited about the you guys meeting each other. Since last year, I've wondered what it would be like if both Oliver Queens were to meet, and now, here you guys are."

"You know, it's too bad Bart didn't get to come along," Conner added. "Just imagine, if he was here with us right now, we would have a major superhero team-up that includes not just two Green Arrows and two Kryptonians, but also two Flashes. At least Barry already got to meet Bart the last time he was on our Earth."

"Yeah, I really enjoyed Bart's company," Barry said, reflecting back on the time he'd spent with the speedster who was, more or less, his Earth-21 counterpart. "He was a really fun guy to hang around, and not to mention how refreshing it was finally having encountered a speedster who genuinely wasn't evil. Anyway, guys, um, Oliver here, he was the first person to train me."

"Really?" Clark said. He turned to Oliver. "From the look of things, I'd say you've done a really good job."

"It's because I didn't hold back," Oliver admitted. "I shot him."

Conner rolled his eyes. "Shot him? What do you mean?"

"He means he shot me in the back with a couple of arrows," Barry explained.

"Ouch," Conner said, placing his hand on his back as he imagined the pain.

"Believe me, when it rains, I can still feel the pain in my back," Barry said.

"So can I," Clark added, shooting a glare at Ollie. "My Oliver did something similar to me once too."

"Really?" Barry asked, surprised.

"I did," Ollie admitted, traces of guilt in his voice. "It was to stop Clark from getting in the way of a plan Bart, Dinah, and I came up with to take care of an alien baddie. Not my proudest moment, especially since that plan ended up backfiring in one of the worst ways possible."

"Wait a minute," Oliver said. "From what Barry told us, I thought Clark and Conner were invincible. That nothing can penetrate their skin."

"Clark and I may be stronger than steel and bulletproof, but trust us, we're far from invincible," Conner said. "Even we have our weaknesses."

"And I don't suppose any of you are gonna fill me in on what those weaknesses are in case I ever need to protect myself from the likes of these two?" Oliver asked, looking especially at Barry and not noticing the faces Clark and Conner made at the last part of his question.

Barry shrugged his shoulders. Indeed, during his first trip to Earth-21, he'd learned about Kryptonians' vulnerability to green kryptonite, but out of respect for Clark and Conner, he decided against sharing it with even Oliver.

"Anyway," Oliver continued, looking firmly at Clark, "like I was saying before, I didn't hold back then. You can't hold back either. Especially against me."

Clark frowned at that as Oliver then walked away. Ollie glanced at his counterpart, then turned to Barry. "Are you sure he's supposed to be me? Because I don't seem to recall myself ever acting like that even on my worst days. He's even grumpier than Hawkman ever was."

"Don't worry about your counterpart," Barry said. "He's like that with everyone. It usually takes him longer than most to warm up to people."

"That, I've pretty much figured out already," Ollie said. He turned to Clark. "You heard the other me, Clark. You kick their asses."

"Whatever I do, Oliver, you know I will see to it that none of these people get hurt," Clark said, as he, Barry, Ollie, and Conner also headed off. "I'd wanna harm the heroes of this world no more than I'd wanna harm any of the League members."