In Union, There Is Strength (AKA: The Loneliest Team Player)
Because he cared, he cared about everyone on the team, even if no one worried a bit about him.
He had planned everything out before it even had the chance of happening, and no one could understand that, so he was left to stand there afterwards as they stared on in shock, congratulating him for being lucky when luck had nothing to do with it.
He'd fought, and he'd fought right next to them, even if his SHIELD file was dripping in red, Natasha's pretty handwriting, and the word consultant.
During the fight? They'd all been equal, and that, that was something mesmerizing.
Tony Stark had always been alone and yet, he had always been a team player.
Prompt off of the Avengers kink meme: "And that is why Tony Stark, is and always was, a team player."