A/N: Here we go, ladies and gents. Invasion begins! BTW, I'm gonna be replying to reviews through DMs instead of posting it on the chapters here. Just wanna let you know. I'll only be responding to guest reviews on the chapters from now on. Just to save space.

Also, I forgot to mention this in the last chapter. The cast for Hal Jordan/Green Lantern in my story is Matthew McConaughey. I have nothing against Ryan Reynolds but seeing as how horrible the Green Lantern movie was, I just can't see him in it. Ryan hating on and regretting the role didn't help matters. So, for me, Matthew is Green Lantern, not Ryan.

Next Morning

S.T.A.R. Labs

"So these things are called the Dominators?" Wanda asked, swaying a sleeping baby Luke in her arms as she confirmed what Hal had just said to her, the Avengers, and Team Flash.

"Basically," Hal said, dressed in normal clothing, his lantern ring inside the pocket of his jacket.

"Who did you say you were again?" Bucky asked suspiciously.

"My name is Hal Jordan," Hal explained once again. "I'm a Green Lantern, part of the Lantern Corps. We protect the sectors of the universe."

"Sectors?" Steve said in confusion.

"The Lantern Corps is led by a council called The Guardians," Hal said. "Wise and powerful dudes. Old as the universe itself. They've discovered a large portion of the universe. The known portion is split into 3600 sectors. Each sector has two lanterns to protect it. Earth, where I'm from, is part of sector 2814. The unknown part of the universe is called the Unknown Sectors."

"So you're a space cop?" H.R. asked as everyone stared at him.

"That's one way of putting it," Hal admitted.

"That…is wonderful." H.R. said, quickly tapping his drumsticks against the table.

Hal chuckled as he pointed to H.R. "I like this guy."

"Right," Sam said. "Anyways, why are these Dominator dudes on this Earth?"

"This Earth?" Hal asked. "Are you people from other earths?"

"A few of us are from Earth 199999," Natasha said. "But that's not what we need to know."

"Right," Hal said. "The Dominators, as far as the Guardians have told me, are here for one of two reasons: to exterminate all metahumans-"

"They want to what?" Harry asked.

"Exterminate all metahumans?" Jesse said incredulously.

"What's the second one?" Joe asked.

"To capture someone," Hal said. "Someone who rewrote and affected the laws of the universe after going back in time and changing the timeline."

"I think we know that someone," Cisco said worriedly as everyone in the cortex exchanged similar looks of worry.

"Yeah," Hal said. "Barry Allen, right? The Flash. Fastest man alive."

"You know him?" Wanda asked.

"The Guardians do," Hal corrected. "And they know practically all there is to know in the universe. Well, except how to tell a joke maybe."

"This doesn't make sense," Natasha said. "If these creatures are so hell-bent on exterminating all metahumans-"

"What exactly is gonna make them satisfied with one?" Sam asked.

"There may be a lot of metahumans," Hal said. "But how many of them can go at the speed of light?"

"As far as we know," Harry said. "Only Barry. And that other speedster he fought."

"You said there's several Green Lanterns," Steve said. "Can you bring them here? Help us out with these Dominators?"

"No can do, tough guy," Hal said regretfully, complimenting Steve's super soldier physique. "The universe has a lot of planets in it. Those planets need their own Green Lanterns. For now, I'm all you got."

"You said there were gonna be more," Wally pointed out. "You said there were gonna be more aliens."

"I'm sorry, what?" Cisco said as everyone stared at all.

"The ship that crashed was just a small part of one of the three sub-ships," Hal explained. "These three sub-ships are controlled by the mother ship, largest of 'em all. It's about as large as the moon. These four ships are right above the atmosphere right now."

"How long until they attack?" Natasha asked.

"Considering how much they hate metahumans?" Hal asked. "Not too long, girl."

"You'll need as much help as you can get," a female voice echoed through the entire cortex.

Everyone jumped as they all looked at the door-shaped entrance of the cortex, standing defensively. At the entrance, there were two unknown people before them. One of them was a slender, black-haired woman. The other was a tall, muscular man with rather long blond hair, and a big beard.

"Calm down, everybody," Hal assured. "They're friendlies."

"Damn straight." the man said.

"We mean you no harm," the woman promised. "We only want to help you."

"Who are you?" Steve demanded.

"My name is Diana Prince," the woman said as she gestured her hand to the man. "This is Arthur Curry."

"Good to see the two of you," Hal said, walking to the pair with a smile.

"Hal Jordan," Arthur grinned before pulling Hal into a bear hug. "Been too long, man."

"I'd say the same," Hal replied as he slipped from the hug before turning to Diana. "Diana."

"Hello Hal," Diana smiled brightly as she and Hal quickly embraced before releasing each other.

"You said you two were here to help?" Joe asked.

"They are," Hal said. "We're old friends. Met each other a few years ago. Ladies and gents, meet Wonder Woman and Aquaman."

"No way," Wally said with a grin.

"The Wonder Woman and the Aquaman," Cisco said with a cheer. "I thought you guys were myths."

Diana gave him a small smile. "We're very much real, Mr…" Diana then had a confused look on her face.

"Ramon," Cisco answered. "But you can call me Cisco. I mean - I - wow, it is just, really good to meet you guys."

"Wanna fill us in here?" Sam asked as he and the Avengers clearly seemed visibly confused.

"We'll tell you the story later," Arthur said. "We got bigger problems right now."

Suddenly, the entire cortex flickered with orange lightning as Barry and Daisy appeared in the center of the cortex, appearing beside Wanda, who comforted a sleeping Luke.

"Hey we came as soon as we got your text," Barry said as he instantly noticed Hal, Diana, and Arthur. "I'm sorry, who are you guys?"

"They're, uh, new friends of ours," Cisco explained, gesturing his hands to the trio of guests. "Here to help us with the aliens."

"Aliens?" Daisy said as she took Luke in her arms, whispering a 'thank-you' to Wanda.

"Yeah, uh…" Cisco said, scratching his head. "We've got a bit to fill you in on."

"Same here," Barry said as he and Daisy looked over to each other. "You wanna tell them?"

"Tell us what?" Joe inquired as everyone eyed the couple, even Hal, Diana, and Arthur were somewhat interested in the topic of discussion.

Holding in one arm, Daisy raised her left hand, revealing the ring of Barry's mother to be resting on her ring finger. Everyone stared in surprise as smiles overtook some of their faces.

"Congratulations," Wanda said happily.

"Barr," Joe said, hugging his son. "I'm proud of you."

"Oh c'mon now, we can stop at this," Hal said with a grin, walking over to Barry and Daisy. "We gotta celebrate…" Hal then remembered that Barry and Daisy had no clue of his identity as he held out his hand towards Barry. "Hal Jordan."

Barry shook as he hesitantly shook Hal's hand, wary of him. "Barry Allen."

"Congratulations brother," Hal said, patting Barry's shoulder with a tight grip. "You got a kid and you're getting married."

"Thank you," Barry said, he didn't trust Hal or the other two people he was with, not with his history of his trusted ones betraying him, but he was willing to work with them given the current situation.

"These Dominators are a very serious threat, Mr. Allen," Diana warned. "We're going to need all the help we can get."

"I know a few people on this Earth," Barry said. "And there's someone, a sorcerer, back on Earth 199999 who I think could help us."

"I could talk to Coulson and the others," Daisy offered, swaying Luke in her arms. "Plus, I've got another friend I could talk to."

"We'll go with you," Steve said as he and Wanda looked at her. "We're still fugitives on our earth."

"Fugitives?" Arthur said in confusion.

"Long story," Barry and the two teams said simultaneously as Arthur nodded.

"We doing this for real?" Cisco said, starting to cheer up. "Is this like a team-up?"

"This might be the team-up of the century," Arthur commented.

"It has to be," Hal said. "Call whoever you can."

"We're going to need a base of operations to start from," Diana said.

"S.T.A.R. Labs has a few facilities across the world," Barry explained. "There's one not too far from here. That or we could always just use this but knowing the amount of people we do, I doubt we'd all fit in here."

"Might wanna go with the first option," Caitlin said.

"Alright," Barry said. "Cisco, give these three the location of the facility. Anyone who isn't going to find someone to help, get to the facility, the rest of us will meet you there."

"We'll get going," Hal said.

"You guys better be calling in the cavalry," Arthur quipped.

"Don't worry," Barry assured. "We are."

Hal, Diana, and Arthur then left the cortex as they made their way to the facility. Wanda took Luke into her arms as she exchanged a nod with Daisy, who, alongside Steve, Bucky, and Sam would be headed. Bucky hugged Natasha goodbye as Caitlin wished Steve good luck, the latter promising the former to keep their word on the dinner date they had to skip. Barry was giving a quick hug of goodbye to Daisy.

"Be careful," Barry whispered to Daisy as the two held each other in embrace

"I will," Daisy promised. "We'll be back soon, I promise."

"I hope so," Barry replied. "Don't want anything to happen to my fiance the day after I just proposed to her."

"We should really tell them about that," Daisy whispered.

"We will," Barry promised back. "Soon. Just be careful for me, okay?"

"I'll be fine, Barry. I promise."

Barry kissed her forehead before the two slipped from each other's embrace. Steve, Bucky, Sam, and Daisy stepped back, Steve holding an extrapolator in his hand. Cisco had given it to him and explained how it worked and how to use it. Everyone watched as Steve pressed the button on the extrapolator as a large, blue, cloud-filled portal opened up. The four of them went through it one by one as Daisy quickly mouthed an 'I love you' to Barry, who did the same. As the four went through, the portal closed behind them, leaving no trace of their existence behind.

"They should be back soon," Barry said as he turned to face everyone else who had stayed behind.

"What do we do?" Wanda asked, swaying a sleeping baby Luke in her arms.

"We split up," Barry ordered. "There's a few people I know but I'm gonna need help getting to them. All of you head to the facility, I'll meet you there."

"Well where are you going?" Wally asked.

"Calling in some backup," Barry explained.

"We could be backup," Wally said, stepping forward as he pointed to himself and Jesse.

"We?" Jesse said incredulously. "Wally, no, this is too dangerous for you."

"Exactly," Joe said sternly.

"They're right, Wally," Barry said. "You just got your powers and you barely know how to use them. I'm sorry but you're sitting this one out."

"You can't just bench me," Wally argued as he stood closer to Barry. "I could be more useful than half the people we're getting."

"Wally, no," Barry said sternly. "Look, get this - the people that I'm going to for help, the people that Daisy and the Avengers are going to for help, they've been doing this for years. And this - this fight, this war, is going to be the hardest thing they've ever done in their lives. If they can barely make it out of this, what makes you think you can?"

"My stats are better than when you first got your speed," Wally argued. "Even H.R. says so."

"Don't look at me, I was just saying," H.R. said, raising his hands in surrender.

"Look," Wally said. "I get it. Jesse and I are mach 11 at the most-"

"10." Harry corrected.

"Whatever," Wally said ignorantly. "And you're as fast as light. You're faster than both of us put together. But Barry, you said it yourself, you need all the help you can get. Let me help."

"No, Wally," Barry interjected. "I'm sorry but this is for your own good, if you go out there, you're gonna get killed. You need training."

"Then train me," Wally suggested. "Teach me all the things you know. I'll be just as fast as you in no time."

Barry sighed. "Look, I have to go. We'll talk about this when I get back. All of you head to the facility. I'm gonna go."

The cortex was eventually cleared by nearly everyone inside. Only Wanda (who was carrying Luke), Caitlin, and Cisco remained inside with Barry.

"Thank you for looking after him," Barry said gratefully to Wanda.

"Of course," Wanda said as Luke lightly cooed in her arms.

"How is he?" Barry asked.

"He's alright," Wanda replied. "I think he misses his parents."

"I'll be back soon, buddy," Barry said softly, looking down at Luke, who stared at him blankly.

Barry then went over to Cisco and Caitlin as the three of them looked across each other.

"We're doing our night out after this, right?" Cisco said.

"I plan on keeping that promise," Barry assured.

"Have fun then, you three," Wanda said with a smile.

"Appreciate it," Caitlin replied.

"So you're heading to Gotham?" Cisco asked.

"Yeah," Barry replied. "Gonna get Bruce and Jason. Then, I'm heading to Bludhaven to get Dick. Then, S.T.A.R. City to get Oliver and his team. After that, I'll gather them all at the facility and from there, Cisco and I will get Kara."

"Yes, Kara," Cisco said, pointing to Barry. "She's on Earth 38, last I checked. I can go get her now, if you want."

"Do it," Barry said. "The quicker we get everyone, the quicker we can explain everything to them-"

"And the faster we can stop these Dominators." Wanda finished.

"Bingo," Barry said. "Alright, Cisco, get to Earth 38, find Kara. Tell her about me. Bring her to the facility…" He then looked at Caitlin and Wanda. "You two, use an extrapolator, get to the facility. I'll meet you guys there."

With that, Barry sped off in a flash of lightning, disappearing from Central City in mere milliseconds as he made his way to a certain Gotham City.

In the Batcave, underground from Wayne Manor, an unmasked Batman, revealing the face of billionaire Bruce Wayne, sat up-straight in a chair in front of the large Batcomputer. His face was a mask of seriousness and brooding as he observed different pieces of footage from Arkham Asylum and Blackgate. On his left, a certain man in his early twenties stood tall. The man wore an armored suit and had a blue technological mask that fully concealed his head and face while modulating his voice. On his left, a tall man with a black domino mask, short brown hair, and a black suit lined with blue stood tall. The man had a pair of metal batons hanging off his back, each baton was hanging diagonally, as the batons shaped an 'X'.

"Daily brooding, I'm guessing," Dick Grayson said as he pulled off his domino mask, putting it on the table.

"Bane orchestrated a breakout at Blackgate," Bruce noted, ignoring Dick's question as the man on his left took off his blue, technological mask as he held it by the rim.

"He and his goons made their way to Arkham and broke out Scarecrow," Jason Todd added.

"We need to stop them before they cause any damage," Bruce said. "Bane is planning something and we can't wait until it's too late to see…" Bruce then paused for a few moments before he sighed. "I know you're there, Barry. What do you need?"

From the shadows of the Batcave, Barry Allen walked forward, dressed in normal clothes as Dick and Jason stared at him in surprise. Bruce turned his chair around before standing as the three of them eyed Barry.

"How's it you sneak up on us?" Dick asked with a smirk as Barry walked over to the trio, hands in his pockets.

"A month of training from Batman, Nightwing, and the Arkham Knight will do that to you." Barry explained.

"For whatever it's worth," Jason said. "You have got to be the fastest learner I've ever met."

"It's good to see you guys." Barry said.

"Something tells me you need our help," Bruce said. "What is it?"

"Aliens," Barry said ominously as Bruce, Dick, and Jason exchanged looks of concern and readiness.

"…and now these Dominators could attack Earth 1 at any moment." Daisy finished as she finally explained everything, her and Barry, the Dominators entering Earth, everything.

"Which is why we need your help," Steve said as Coulson, May, Simmons, Fitz, Mack, Hunter, and Bobbi exchanged glances with one another. "We know you can't give us all of S.H.I.E.L.D. but we don't need you to. We just need all of you."

"You have our help, Cap," Coulson said.

"I don't like aliens," Mack said as he shuddered at the thought of laying his hands on alien skin. "But I'm in."

"So are we," Fitz said as he and Simmons walked forward. "You'll need a way to get past their technology if they try to pull off something. Brains and brawns, yeah?"

"I think it's safe to say we're all in, guys." Hunter said dryly.

"All of us aren't gonna be enough for a whole army of aliens," May warned.

"Yeah," Bucky admitted. "But Allen's got a lot of friends. They're with us too."

"Plus, we also got the Green Lantern dude and those other two guys." Sam added.

"Speaking of friends," Steve said as he turned to Daisy. "You said you knew someone who could help? Someone in New York City?"

"Yeah, I do," Daisy said.

"Also," Bobbi began. "Care to fill us in on how exactly Barry's alive?"

"And when did he propose to you?" May asked, observing a certain ring on Daisy's ring finger.

"Barry did what?" Mack asked.

"Right, about that…" Daisy said as she raised her hand, revealing a ring resting on her ring finger as everyone (aside from Steve, Bucky, and Sam) stared in surprise. "Barry proposed to me."

"Oh my god!" Simmons exclaimed as she pulled Daisy into a bone-crushing hug. "Congratulations. I'm so happy for you."

"Jem…" Daisy whispered. "Can't breathe."

"Oh sorry!"

Simmons quickly released Daisy as the pair stood proudly next to each other. Eventually, Daisy found herself in a bear-hug from a proud and smiling Mack.

"Congratulations partner," Mack grinned as he and Daisy separated.

"You better be there at my wedding, partner," Daisy smirked.

"We're all gonna be there," Bobbi promised, putting her hand on Daisy's shoulder.

"Daisy…" Coulson said lightly. "Congrats."

"Thank you, Coulson," Daisy said.

"We're happy for you, Daisy," May said. "But we need to focus on this right now."

"Well, we've got you guys on-board," Sam sighed.

"I need to get to New York City," Daisy said.

"I'll go with you," May insisted.

"You sure?" Daisy asked.

May didn't respond as she simply walked past Daisy, getting ready for her and Daisy's mission to New York City. Daisy and everyone else were surprised by May's strange attitude and behavior, perhaps it had to do with the revelation of Daisy being engaged to Barry, who had been presumed dead for over a year by the agents and the Avengers.

"Is she gonna be okay?" Sam asked.

"I seriously hope so." Daisy muttered under her breath.

"So this guy you're looking for," Coulson said. "Who is he?"

Daisy sighed. "His name is Matt Murdock. Though he goes by Daredevil."

Inside an apartment in National City, a large blue portal opened as a black-haired, latino man immediately jumped through. He landed on his feet as the portal closed right behind him. The man rose to his feet, stumbling foolishly as he took off his vibe goggles, observing the beautifully decorated apartment around him.

"Okay," Cisco Ramon said, taking a deep breath. "This better be Earth 38 and this better be the right place. Because if it isn't the right place, someone is about to be seriously confused. Man, I should've brought Barry with me."

Suddenly, the door to the apartment opened as Cisco immediately jumped in surprise. The door opened, revealing a blonde-haired woman with glasses and a large amount of shopping bags standing on the other side. The woman stared at Cisco in confusion as she entered the apartment, closing the door behind her.

"Can I help you?" the woman asked, surprising Cisco as to how she was relatively calm with an intruder in her home.

"You have a lovely place," Cisco said sheepishly. "Right, uh, ignore me…" Cisco then stuttered. "Well, don't ignore me but, uh…ah screw it. Look, are you Kara Danvers?"

"That would be me," Kara said slowly. "Why? Do I know you?"

"Okay," Cisco began. "A few months ago, you met a close friend of mine: Barry Allen. Six feet tall. Brown hair. Red suit. Ring a bell?"

"You know Barry?" Kara asked, excitement growing in her as she stepped closer to Cisco.

"Yeah," Cisco said as he held his hand out to Kara. "I'm Cisco Ramon. Barry's best friend."

"Oh you're Cisco!" Kara said excitedly as she shook Cisco's hand, unknowingly breaking two of his fingers. "Barry's told me a lot about you."

"Ow." Cisco muttered as he shook his hand repeatedly to the side.

"Oh, I am so sorry," Kara said, wincing as she saw Cisco forcibly crack his fingers back into place. "Are you okay?"

"I'm good," Cisco assured. "Barry says hi, by the way."

"So, uh…what exactly is it Barry needs help with?"

"Long story short…aliens."

"Aliens?"

"Aliens," Cisco confirmed. "There's a whole army of them and we need all the help we can get. So, if there are any other super powerful friends you have, now would be a lovely time to call 'em over for a little 'let's-go-fight-aliens' moment."

Just then, the door to the apartment opened as Kara and Cisco turned around to see who was entering. They looked in time to see a rather tall and handsome man closing the door to the apartment. He was six feet tall, with straight black hair, wearing a suit, glasses, and a beige-colored trench coat. Kara looked in surprise as Cisco looked between the two in confusion.

"Well," Clark Kent said as he took off his glasses. "Looks like I came just in time."

A/N: That's it for now.

Bruce's Batman suit is the main suit from the game Batman: Arkham Knight. Jason's suit is the Arkham Knight suit from the same game. In this story, he's the Arkham Knight, a hero/anti-hero figure. Not Red Hood. Dick's suit is the same as it is in the Titans series.

Also, if you want to put faces to these three, just imagine Christian Bale for Batman, Dylan O'Brien for Jason, and Brenton Thwaites for Dick.

If you want to put faces to Clark, Diana, and Arthur, the castings are as follows. Tyler Hoechlin for Clark, Gal Gadot for Diana, and Jason Momoa for Arthur. I was considering casting Henry Cavill for Superman but I decided to go with Tyler because I liked his Superman and his Clark Kent more than Henry's as his version in Superman & Lois was actually really great and far better written than Henry's (never thought I'd say something like that for the CW). Say whatever you want about the CW but they've hit home runs with Smallville and Superman & Lois. I might cast Henry as a Superman variant in the future of this series but for now, it's just Tyler. I do like Henry's version of Superman but Tyler's is more appealing to me due to comic accuracy as well as the character being written well.

This is just part one of Invasion. I'll finish the gathering of heroes in the next chapter and hopefully get a fight scene or two in. There will be about seven parts. Ten at the most. But this version of Invasion is gonna be longer than the CW version (and hopefully better). Seeing as how the limits of the crossover in this are really just my imagination, I decided to not waste an opportunity at making a better crossover (hopefully).