I wrote this drabble/short story during a chat with my friend - he liked it and told me to upload it.
Tell Casey 'thank you'.
Everyone lunges at each other, the brawl going down in a Tesco parking lot.
A few blows are swapped, but most of the participants are preoccupied watching the main event: Iron Man vs. Captain America. Black Widow and Ant-Man even started a betting pool mid-battle over who will win. Spider-Mn can't participate cause he's too poor and underage. All the spectator's in the the building had their camera phones out, filming the fight with curiosity and an intense need to explain to their boss why they couldn't make it to Phoenix that day to close the big deal. Also, the other heroes started playing poker in the middle of the parking lot and everyone was wondering how Hulk of all people was winning.
After some minutes, Tony and Steve broke apart from their fist fight, half of Tony's helmet busted in half and Steve's suit shredded along his shoulder - showing off his perfect bicep. Pictures taken by all, though Bucky is having trouble working the camera phone Black Widow shoved into his hands. Poor guy.
"I thought I was doing the right thing for once!"
Tony shouts at Steve, sweat dripping down his face and soaking into his beard.
"Is the 'right thing' controlling people - you sound just like Ultron!"
Everyone present yells 'oh burn', Deadpool even breaking the forth wall and copyright laws to pop in and gasp.
Tony swallows at this, but realizes exactly what Steve said a year ago was right, but in all the wrong ways.
"Ultron was right."
Tony whispers, Steve close enough to show a little shock at Tony actually agreeing.
"What did you say?"
Steve needed to know, needed to hear it again. Tony looked Steve straight in the eye... well, about as straight one can look with a head wound.
"Ultron was right because... You'll never be satisfied with peace Steve. You're a fighting machine, it's what you were made for. And, at the end of the day, the suit comes off and I'm not Iron Man anymore. But you... You don't turn off, Captain America doesn't have an off switch. You'll be Captain America til the cows come home. You'll always find something to fight against."
Everyone stood in awe and horror, as Tony making a valid point was clearly the end of the world. No one knew what to say, who to support - their entire system came crashing down around their feet with the realization that they would one day become like Ultron.
It cuts to credits and the stinger is Deadpool screaming and throwing popcorn at the screen.