Earth-1 Laurel will be referred to as "Laurel", Earth-2 Laurel will be referred to as "Siren".
Disclaimer: I do not own DC Comics or the CW TV shows Arrow, The Flash, Legends of Tomorrow, Supergirl or any other characters or elements pertaining to the mentioned franchises.
"Laurel?" Barry stared in disbelief.
"Don't look so surprised. It hasn't been that long." Siren smirked.
Black Hand got up on his feet, eying Laurel in disgust. "I was wondering when you'd show up." He formed a blade in his hand, about to impale her.
Barry sped towards Siren and tackled her before the blade would hit her. Black Hand formed a hammer but Barry and Laurel rolled away. Siren unleashed her Siren Cry, but Black Hand formed an armor, holding his own, on his feet.
"We need to find a way to separate him from that ring before he—" Barry and Siren were suddenly knocked away by the black blast of energy.
"…does that?" Siren drawled as they both got up.
"So, you're the screamer who kept a low profile." Black Hand realized as he charged his ring. "Well, when I'm done with you both—"
Next thing Black Hand knew, a car drove in, knocking him down as Wally opened the passenger door. Not hesitating, Barry and Siren got in as he drove away.
"Wally? How did you find us?" Barry demanded.
"I've been eavesdropping on what's been going on at S.T.A.R. Labs. Thought you might need help." Wally said and Barry sighed.
"Damn it, Wally. Look, I get it but you're putting yourself in danger. We'll talk about this later, OK? Right now we need a plan." Barry said as Wally turned to Siren.
"Hey, aren't you the District Attorney of Star City?" Wally asked.
"Well, it's complicated." Barry sighed.
Later, S.T.A.R. Labs
"So, let me get this straight. On Earth-2, you and I are best friends, with Barry being my boyfriend and you have this curse that allows you to have this…" Patty trailed off.
"Siren's Cry." Siren explained.
"How did you get here?" Barry asked. "What happened to you?"
Siren took a breath. "After you told us to run, I ran to Starling City, while Barry and Patty, well, my Barry and Patty, they went to Atlantis. I kept a low profile until I saw on the news that Zoom was leaving somewhere with his army. I knew immediately that he was coming into your world, so I followed them. You saved me, so I figured this was the least I could do for you."
"Thanks, Laurel." Caitlin said.
"'Dinah'. I've heard there's another Laurel Lance here too. I don't want there to be confusion, so call me 'Dinah', OK?" Dinah said and they nodded.
Barry turned to Wally. "Wally, I appreciate what you did tonight and I get what you were trying to do but you shouldn't have put yourself at risk like that."
"Barry, I can't just sit on my butt and do nothing. Let me help. Please." Wally pleaded.
Iris sighed. "Wally, we understand that but this isn't your fight—"
"No. This is as much my fight as yours. We're in this together now. All of us." Wally said, determined.
Barry, Patty, Joe and Iris looked at each other before sighing. "OK. But don't put yourself at risk like that again, if you wanna help, you're going to do everything we tell you, got it?"
Wally nodded. "What's the plan?"
"Right now, Harry and Jesse are working on it. I think we got this. We got more than luck on our side." Barry said.
Patty cleared her throat. "Barry. Can I talk to you for a minute? In private." Barry nodded as he and Patty were in the corridor, with Patty leaning onto her crutches. "Barry, look, I get that… whatever happened to you in the Speed Force, makes you feel stronger but… you do realize that you're not invincible, do you?"
Barry smiled, folding his arms. "Yes, of course, I know this. I understand that you're worried about me—"
"Barry, you're not listening to me." Patty gave him a pleading look. "You're acting as if you're untouchable now. As if nothing could hurt you now. Barry, just because you're faster than before, it doesn't make you a god. Look, my point is, being too cocky and overconfident, is only going to get you killed eventually. You'll lower your guard and you might not see coming whatever comes your way until it's too late. It's alright to be scared. It keeps you on alert. Keeps you from being too confident. This way you are able to cover all your bases and be sure you don't overlook something or get caught off-guard. At least you'll be careful enough to know which risks are worth it."
Barry considered and nodded.
"Barry, no matter how fast you are, you can't beat Zoom and his army on your own. You can't do this alone." Patty said and an idea hit Barry.
"Maybe I don't have to." Barry said, an idea hitting him as he approached Cisco. "Cisco, can you make a breach to Star City? We're going to need help. And see if you can reach out to the Waverider somehow."
Later, Central City
The Flash was in the middle of the street with Siren, facing Zoom and his army.
"So, you've come here to die with this city?" Zoom gloated.
"No. We've come here to stop you." Barry said. "This is not your Earth. You have two options. Get out or I'll make you."
Zoom laughed. "How are you going to stop me? Just the two of you?"
"It won't be just us, who's gonna stop you." Barry glared.
And on cue, Green Arrow, Speedy, Arsenal and the Black Canary showed up and then Waverider appeared from above as on the ground teleported Sara Lance, Rip Hunter, Kendra Saunders and Carter Hall, Leonard Snart and Mick Rory and Jax Jackson, as Firestorm and Lisa Snart came next to them.
"Zoom!" Oliver shouted, notching an arrow. "You have failed this Earth!"
Siren stared in disbelief as she saw Oliver.
Zoom snarled, about to rush at Oliver but Barry pushed him out of the way before chasing after Zoom.
Oliver, Roy and Thea opened fire at the metahumans.
Kendra and Carter flew at the metahumans from above, knocking them down. Carter dodged as one of them threw an electric lasso before slamming his mace into his face. Kendra flew away to dodge some energy balls before grabbing the metahuman, flying up with him and slamming him to the ground. Ray flew around with his Atom suit, blasting down the metahumans.
Laurel and Sara jumped over the cars, dodging metallic spikes as the metahumans tried to shoot them before Firestorm flew down from above, throwing fireballs and knocking them down. Siren unleashed her Siren Cry, knocking down some of the metahumans coming their way.
Jax flew down and faced off with Killer Frost.
"Well… you're not my Ronnie." Frost sneered, forming an icicle in her hand. "If you were him, killing you would be more painful to me." She threw icicles but Jax burned them before trying to blast her but Frost dodged.
"Like looking into an evil mirror." Jax said.
"In this case, that might be true, Jefferson." Stein said. "Watch out!"
Jax dodged as another metahuman opened the ground beneath Jax as he was covered in concrete but Jax melted the concrete with his powers before blasting the metahuman.
Oliver, Thea and Roy dodged but were suddenly trapped in some energy field as Black Hand raised his ring, crushing them as they gasped for air.
"This… is… a nightmare…" Thea choked.
"You'll see your friend soon enough." Black Hand smirked, tightening the grip. Next thing he knew, blue beam shot his hand, in which he had the ring as the energy field dissipated and Black Hand's force field went down for a moment, with his hand frozen as Snart fired from his cold gun. Before Black Hand could recover and create another force field to protect himself, Mick burned him alive with his flamethrower.
"Fry, you freak." Mick sneered.
As more metahumans attacked, Lisa shot from her gold gun, encasing them in gold-colored substance.
Rip opened fire but was surrounded by metahumans as they were about to attack him, while he was aiming his gun at them.
"You'll have to bring something bigger to take us down." One of the metahumans said, throwing a torrent of fire at Rip but Rip dodged.
"Something bigger? You asked for it." Rip said. "Gideon, fire!"
And on cue, Waverider turned off its cloaking and started shooting at the metahumans, who scattered. Some of them tried to shoot back but were unable to penetrate Waverider's shields.
Sara dodged the electric whips one of the metahumans threw at her but was knocked down as he ensnared her leg. Laurel came to help as she and the metahuman exchanged blows but she cried out in pain as he burned her in the hip.
Before the metahuman could finish them off, Siren showed up and unleashed her Siren Cry, sending him flying away as Laurel stared at her doppelganger in disbelief.
"Well, I'm glad you didn't do that, whenever you yelled at me." Sara cracked.
Laurel turned around and saw a metahuman throw an acid ball at her but Ray, who was reduced, enlarged himself, wearing his Atom suit, knocking the metahuman out.
Jax's flames and Frost's ice beams were in a stand-off before Mick joined the fray, overpowering Frost and burning her alive.
"That's… creepy." Jax said.
"Huh. I really got to burn the doctor." Mick quipped.
Barry and Zoom were running down the street, from one building to the other, while fighting each other before they ran up a side of a building and jumped down, freefalling, and their fight became an endurance test as they exchanged blows, like the last time they fought. As they crashed to the ground, this time Barry was prepared, as he slammed Zoom to a car in an alley but Zoom dodged the punch and buried his claws into Barry's hip as he cried out in pain.
"When I'm done with you, I'll make you watch as I kill everyone you love. Then, as I conquer this Earth, I'll feed off of what's rest of your speed." Zoom gloated.
"No, you're not." Barry jammed a syringe into Zoom's chest as he screamed. "Speed-dampening serum. But strong enough it negates V-9 in your system."
Zoom glared, trying to hit Barry but he was slower than before due to the serum entering his system. Zoom roared, but Barry blocked his blows before retaliating and overpowering Zoom with his speed and precise hits. Zoom managed to pin Barry to the wall with whatever speed he had left, pummeling him but Barry gained the upper hand as he vibrated his hand as Zoom smirked.
"Kill me. Do it." Zoom gloated. "Even if you lock me up, my army will never stop coming. And they won't stop until everyone you love, is dead. Your father, Caitlin, Patty—"
Barry roared, about to plunge his hand into Zoom's chest but then two Time Wraiths appeared. Barry stepped back and gasped in fear, thinking they were after him but much to his surprise, they flew around Zoom, who screamed in agonizing pain, his face decaying before the Time Wraiths grabbed him by his arms and flew with him into a portal in the sky before vanishing.
"What the…" Barry stared.
"Barry! Barry, it's ready! Do you copy?" Harry called out.
"Yeah! Zoom's gone." Barry said.
"Gone? What happened?" Cisco called out.
"I'll explain later." Barry panted out, still in shock.
"Barry, we need you to run around the city so that the pulse bounces off the field you generate. Oliver and the rest are losing!" Harry said.
"Got it." Barry said, running around the city, creating an energy field as Cisco and Harry, who, alongside Jesse, were wearing headphones, turned on the device.
Much to Team Arrow's shock, Siren and other metahumans spasmed, holding their ears, screaming before falling unconscious.
"Is it over?" Oliver asked.
"Looks that way." Laurel said.
So, hope you liked Team Arrow and the Legends helping out. I originally considered involving Team Supergirl too but I realized that Cisco had not mastered his powers in Season 2 to be able to travel to other Earths than Earth-2 and involving Kara and J'onn would probably make the final fight too one-sided.
Hope you liked the fight scenes, but I made it a bit condensed and smaller, since it would be too hard to follow, if I would write it in detail.
In this story, the final fight with Darhk had gone differently, since let's face it, the whole "Happy thoughts stop magic" was stupid, so here, Oliver killed Darhk soon after 4x18.
And Barry tossing Zoom aside for the Time Wraiths to get to him was stupid, considering what happened later. Barry basically sentenced Zoom to fate worse than death and letting someone die instead of killing them themselves, is just cowardly and stupid, whilst convincing themselves that they have no blood on their hands. So, like in Stand and Ward and Queen's story, instead of letting the Time Wraiths take Zoom, Barry thought that they were after him, backing away in fear.
The next chapter is going to be the aftermath and epilogue of this story.
So, what do you guys think?
Please review and let me know if you have been enjoying this and want for me to continue.