Disclaimer: I do not own anything in Arrowverse or Marvel Cinematic Universe, DC Comics, Marvel Comics or any characters or elements pertaining to the mentioned franchises or anything else you may recognize.
As the Sentries started to shoot at the civilians, Hulk jumped on one of them and ripped it apart.
Wanda was helping some civilians to find shelter, while Clint and Oliver were covering her as Wanda threw one of the Sentries away.
Clint jumped and flipped over a car and shot a Sentry in the head.
"Show-off." Oliver said before he fired three arrows that electrocuted a small squad of Sentries.
Clint then spotted more Sentries in the sky before he grabbed Wanda. "Go, go, go!"
Clint, Wanda and Oliver jumped into a building as Wanda looked terrified, curling into a ball.
"How could I let this happen?" Wanda whispered.
"Hey. Hey. You OK?" Clint asked, holding her.
"This is all our fault." Wanda said.
"Hey, look at me! It's your fault, it's everyone fault, who cares?" Clint said.
"Look, blaming yourself is not going to help, especially in a time like this. Are you ready? Are you?" Oliver said.
"We need to know because the city is flying, we're fighting an army of robots and we have bows and arrows. None of this makes sense…"
Clint and Oliver suddenly dodged a gunshot through the window before Clint shot a Sentry.
"But we're going back out there because that's our job." Clint said.
"But we can't fight these things and worry about you at the same time. Doesn't matter what you did or what you were. Either way, it's life or death. No one is gonna force you to do anything you don't wanna do." Oliver added.
"You go out there, you fight and you fight to kill. You stay here, you're good. We'll send your brother come find you. But if you step out that door…" Clint said.
"…you're an Avenger." Oliver finished before he and Clint notched arrows.
"I'll race ya, G.A." Clint quipped.
"May the best archer win, Hawkeye." Oliver chuckled as he kicked the door out.
Steve rushed to a car on the bridge that was about to fall off the edge but it broke off his grip and fell down before Thor grabbed the woman and threw her up as Steve grabbed her.
"I got you! Just look at me!" Steve ordered as he helped her climb up.
"You can't save them all." A Sentry said before Steve threw his shield as it embedded itself into its chest. "You'll never—"
Steve pulled the shield and caught it as the Sentry fell off the edge. "Never what? You didn't finish!"
Thor landed with a car as Steve turned to him. "What, were you napping?" Steve cracked.
Natasha flipped forward with Daredevil and Sara, destroying the Sentries with their batons.
Logan sliced through the Sentries with his claws, while Steele was shooting them down with his minigun and Diggle fired from his gun.
Barry phased through the Sentries, overloading them, while Pietro smashed them into pieces.
Spider-Man webbed up a Sentry and swung around, making it smash other Sentries.
Jessica threw a Sentry away, while Luke smashed a group of them with a car. Colleen threw her katana channeled with chi and threw it like a boomerang, destroying some Sentries in the process before she caught it but then more Sentries rushed at them, surrounding them.
"Shit." Jessica groaned.
"Colleen. Patty cake." Luke said.
"What?" Colleen asked, confused.
"Fire it up and hit my hands." Luke said. "Jess, get down."
Jessica nodded as Luke prepared his hands. Colleen charged the Iron Fist and slammed it at Luke's palms and the following shockwave destroyed the Sentries surrounding them. A group of Sentries then showed up before Jessica and Colleen turned to Luke, who shrugged. He grabbed both of them and threw them at the Sentries as Colleen smashed one of them with her Iron Fist, while Jessica slammed some of them to the ground.
As Thor landed with Steve, Steve kicked his shield up and Thor knocked it away with his hammer, destroying many Sentries as it bounced off them. Thor jumped up and threw the Sentries away as one of them hit a petrol van and exploded, destroying more Sentries in the near proximity.
"Thor." Ultron said before grabbing him. "You are bothering me."
"How many you've got?" Clint asked.
"Frankly, I stopped focusing on counting and started to focus more on surviving!" Oliver snapped as they took cover behind a car.
Suddenly, Wanda went out, telekinetically ripping apart a Sentry and firing a hex blast, destroying another one as Clint and Oliver nodded.
"All clear here." Clint said.
"We are not clear. We are very not clear." Steve snapped as he slammed a Sentry to a car and threw a shield at it before kicking it and destroying it.
"We're coming to you." Clint said before Pietro grabbed Wanda and Barry grabbed Oliver, speeding them away.
"Keep up, old man." Pietro said.
Clint sighed in annoyance and notched an arrow at the speedsters. "Nobody would ever know. Nobody." He put the arrow back into his quiver before running. "Last I saw them, Ultron was sitting on them. Yeah, they'll be missed, little bastards, I miss 'em already." Clint muttered sarcastically.
Ultron threw Thor back into the church and with a gravity pull threw the debris at his face. Ultron punched Thor, making him drop his hammer.
Pietro and Barry sped Wanda and Oliver to the police station as the cops stopped shooting. Wanda fired a hex blast, destroying some Sentries before a bullet grazed Pietro. Pietro turned around and glared at the cop, who shot at him by accident.
"Romanoff!" Steve threw his shield to Natasha.
"Thanks." Natasha said before she blocked a shot from a Sentry. Daredevil jammed his clubs into its neck and ripped its head off before Steve picked his shield and smashed it.
Tony scanned the engines as he tried to come up with an idea as he was flying under the city with Ray.
"The anti-gravs are rigged to flip. Touch them and they'll go full reverse thrust. The city's not coming down slow." FRIDAY said.
"The spire is Vibranium. If I get Thor to hit it…"
"…it'll crack but it's not enough. The impact would still be devastating."
"What if we cap the other end to keep the atomic action doubling back?" Ray suggested.
"That could vaporize the city. And everyone on it." FRIDAY protested as Novi Grad kept flying up high.
"The next wave's gonna hit any minute. What do you got, Stark?" Steve asked.
"Nothing great." Tony said. "Maybe a way to blow up the city. That'll keep it from impacting the surface, if you guys get clear."
"I asked for a solution, not an escape plan." Steve argued.
"Impact radius is getting bigger every second. We're gonna have to make a choice." Tony said.
"Steve, there's no way out of here." Steele said. "It's either Sokovia or the world."
"I'm not leaving this rock until there's one civilian on it." Steve protested.
"What if we can't leave?" Natasha pointed out as Steve turned to her, surprised she would have a death wish as she looked at the sky. "There's worse way to go. Where else am I gonna get a view like this?"
"Glad you like the view, Romanoff." Fury called out. "It's about to get better."
A Helicarrier flew up to the edge of the city as Oliver, Sara and Matt heard a familiar voice. "Hey, guys. Missed me?"
"Cameron!" Oliver laughed.
"Nice, right? Pulled it out of mothballs with a couple of old friends. She's dusty but she'll do." Fury said.
Hill and Klein helped coordinate the lifeboats as they flew to the city.
"This is S.H.I.E.L.D.?" Pietro asked.
"This is what S.H.I.E.L.D. is supposed to be." Steve said.
"This is not so bad." Pietro noted.
"Let's load them up." Steve ordered.
A group of Sentries flew towards the Helicarrier before War Machine appeared, destroying them as Iron Man and Superman joined him, while Steve, Peter, Steele, Clint, Oliver, Diggle, Barry and Pietro helped evacuate the civilians.
"You think you're saving anyone?" Ultron taunted as he grabbed Thor by his throat. "I turn this key and drop this rock a little early and it's still billions dead. Even you can't stop that."
"I am Thor, son of Odin and as long as there's life in my breast… I… am… running out of things to say. Are you ready?" Thor said, leaving Ultron perplexed before Vision hit him with Mjolnir, sending him flying away.
Vision handed the hammer to Thor. "It's terribly well-balanced."
"Well, if there's too much weight, you'll lose power on the swing, so…" Thor shrugged.
"I got it! Create a heat seal!" Tony said.
"Yeah, we can supercharge the spire from below!" Ray agreed.
"Running numbers." FRIDAY said as Tony, Ray and Rhodey were shooting down the Sentries. "A heat seal could work with enough power."
A corner of a lifeboat was destroyed as it was coming down before Ray picked it up.
"We got it, guys! We have a plan!" Ray called out.
"We're out of time. They're coming for the core." Thor protested.
"Ray, Rhodey, get the rest of the people on the carrier." Tony ordered.
"On it." Rhodey said.
"Got it." Ray said.
"Avengers, time to work for the living." Tony said as Steve, Wanda, Clark, Pietro, Clint, Sara, Oliver, Matt, Natasha, Colleen, Luke, Jessica, Peter, Barry, Diggle and the Hulk returned to the church.
"What's the drill?" Natasha asked.
"This is the drill." Tony pointed to the core. "Ultron gets his hand on the core, we lose."
Hulk jumped to the church as Ultron appeared.
"Is that the best you can do?" Thor challenged before an army of Sentries appeared.
"You had to ask." Steve grumbled, shooting Thor a glare.
"This is the best I can do." Ultron said. "This is exactly what I wanted. All of you against all of me. How could you possibly stop me?"
"Like the old man said: Together." Tony said.
Hulk roared as the army of Sentries rushed in. Steve smashed them with his shield, while Thor used Mjolnir and lightning to destroy the Sentries. Clark, Vision and Tony flew around, blasting them and Pietro and Barry sped around, destroying the Sentries as they sped through them. Diggle, Natasha and Steele fired from their guns, while Luke and Jessica smashed the Sentries with their bare hands. Colleen channeled the chi into her katana, slicing through the Sentries as Clint and Oliver fired from their bows and Matt used his billy clubs and Sara used her batons to fight back. Logan sliced through them with his claws as he roared, while Spider-Man webbed up the Sentries.
Ultron flew at Vision and threw him to a wall but Vision fired a beam from the Mind Stone, sending him away. Thor then fired his lightning and Tony fired from his repulsors, while Clark used his heat vision, the combined forces from the barrage burning through the Vibranium and destroying Ultron's armor.
"You know, with a little bit of hindsight…"
Ultron was interrupted, when Hulk knocked him away and then he roared at the remaining Sentries as they ran off and Hulk ran after them.
The Sentries were flying away before Rhodey and Ray engaged them until, to their surprise, they did not expect Vision to destroy them.
"OK, what?" Rhodey said, perplexed.
"What was that?" Ray wondered.
"We gotta move out. Even I can tell the air's getting thin. You guys get to the boats. I'll sweep the straggles. I'll be right behind you." Steve ordered.
"What about the core?" Clint asked.
"I'll protect it. It's my job." Wanda volunteered.
"We'll finish the evacuation." Oliver said as they moved out.
Matt and Natasha were running down the streets.
"So… Vixen?" Natasha asked.
"Yeah." Matt said. "I'll tell you how we took him out once we… move!"
Matt tackled her away as Ultron in a Quinjet fired at them.
Clint was picking up a little boy and saw the gunfire coming his way and was ready to die, shielding the boy until a bolt of lightning grabbed him and sped him to the safety.
"You OK?" Barry asked.
Clint breathed out in shock as he nodded.
Hulk grabbed Matt and Natasha and jumped them to the Helicarrier before he jumped into the Quinjet and threw Ultron out.
"Oh, for God's sake!" Ultron said as he hit the ground, crashing into a train.
"Get out of here, guys, it's about to fall!" Ray ordered.
Pietro grabbed Oliver and Sara, while Ray and Barry helped Steele, Logan, Jessica, Luke and Colleen onto a ship as Peter web-swung onboard the Helicarrier.
The city started to fall down before Tony flew down onto the bottom of the core and fired a Unibeam. In the church, Thor slammed the core, while Vision grabbed Wanda and flew her to safety and the shockwave destroyed the entire city as the debris fell into the water.
"Where's Hulk?" Oliver wondered as he looked around.
"He's in the Quinjet. I tried to tell him to turn back but he shut me out." Klein said.
Matt hugged Natasha and kissed her fiercely. "Natalia Aliana Romanova. Never do that again."
"No promises." Natasha teased as they both laughed, relieved to be back together.
"There was something I wanted to ask you." Oliver said as they were resting, while he faced Sara in their room. "After all we've been through… I don't want to have any regrets."
"What do you mean?" Sara asked.
"Whatever happens, something tries to push us away. Yet, we come back to each other. And everytime that happens, I live with more regrets over what might happen, if I lose you. Sara. I love you with all my heart. All my soul. You mean the world to me. And I can't imagine a world without you in it. Whatever happens, I want you with me, wherever the road is gonna take me." Oliver said and Sara felt touched as he fell to his knees and pulled out a box, opening it to reveal a ring with a diamond.
"Sara Lance. Will you be my wife?" Oliver said and Sara felt her eyes get wet.
"Ollie… yes! Yes! Thousand times yes!" She kissed him fiercely as they hugged each other tightly, never wanting to let go.
In a nearby forest, a lonely Sentry, half destroyed, controlled by Ultron, climbed out from the crater before Vision landed in front of him.
"You're afraid." Vision said.
"Of you?" Ultron scoffed.
"Of death. You're the last one." Vision said.
"You were supposed to be the last. Stark asked for a savior, and settled for a slave." Ultron said.
"I suppose we are both disappointments." Vision pointed out and Ultron laughed.
"I suppose we are." Ultron agreed.
"Humans are odd. They think order and chaos are somehow opposites and try to control what won't be. But there is grace in their failures. I think you missed that." Vision said.
"They're doomed." Ultron glanced behind him.
"Yes." Vision nodded. "But a thing isn't beautiful because it lasts. It's a privilege to be among them."
"You're unbearably naïve." Ultron said, exasperated.
"Well, I was born yesterday." Vision said.
Ultron lunged at him but Vision charged the Mind Stone and obliterated the Sentry and Ultron was no more.
Elsewhere, a man with short hair searched the ruins and found an elderly man holding in his arms a woman and a young boy as the man's eyes got wet, mourning for his family, falling on his knees as he glared at the Helicarrier flying away.
"Avengers… you will all pay." The man said, with a noticeable Sokovian accent.
Obviously, Pietro did not die here and let's face it, Barry is faster than him. Quicksilver can run at speed of sound, the Flash at the speed of lightning.
I think you know what is going to happen next.
So, what do you guys think?
Please review and let me know if you have been enjoying this and want for me to continue.