Happens right after New York.
Tony wakes up remembering the Snap and everything that happens before it yada, yada, yada,
He decides to do things a bit differently starting by locking the Tower against the team and having JARVIS go through SHIELDRA and find all their people and cross-reference with those working for him worldwide and then alerting security to them about corporate espionage and theft. After getting some rest, he orders the spare suit be made ready for him, and while that is happening, has JARVIS audit the company's and his accounts and shut down all SHEILDRA monetary access and at the same time release the WSC recording of ordering the nuke to be launched at NY. Thereby making both the WSC and SHIELD a terrorist organization who had shown they weren’t above hijacking a country’s nukes to bomb someone.
After getting into the newly charged suit, he checks with JARVIS to see where Iron Man is needed and heads out to help in the recovery of the city, while the rest of the so-called team does nothing till everything hits the fan.
~ooOoo~
While helping to remove one of Leviathans from where it was hanging from a building, Fury, and team, complete with Cap., in full regalia, try to confront him. Tony had been on the horn with the governor, and through him, the President, to find out just who/what authority SHIELD actually has…none in the US that is officially recognized, the postman walking a route has more authority than they do. So, when Fury tries to strongarm his way through SI security with his people using his pass, he is surprised when he is stopped by armed guards for being a terrorist and leader of a terrorist org.
He, and Cap., call out to Tony to stop all this nonsense, with Stevie-boy going “don’t you know who I am? I’m Captain America!” Pose, Pose.
The guard just looks at him like, yeah right pull the left one it’s got bells on mate, and flat out tells him that he grew up on the comics, so if he was the famous Captain why was he only in his 20’s and not, you know, older than dirt.
Tony snorts and decides to play with this and walks up to the guard, lifting his facemask and goes, “didn’t you know? Cap, died in the plane crash, this is some meta like in the news, that has some extra strength and shit. They just tossed a copy of Cap’s outfit on him for propaganda purposes like they did the original before they shipped him out to the frontlines. If you talk to him, you'll find out he’s all talk and no brain, unlike the original Cap. Perfect for a Dancing Pony Show, but meh for the real Cap.”
This of course gets Stevie-boy pissed and he pulls his shield back to throw at Tony and the soldier, but Tony, who is prepared this time, slams his mask back down, pushes the soldier behind him, and fires his repulsar at Steve’s hands, frying his fingers, and forcing him to drop the shield, which Tony picks up and deposits with SI Security since the shield rightfully belongs to SI via Howard.
He branches his hands at the team, along with the soldiers who have their guns pointed at them now; “As I said, a meta, and not the real deal, ‘cause there’s no way Cap would throw his shield where an American soldier could get hurt, especially over hurt feelings.”
This ends any chance SHIELD, or any other agency has of using Stevie-boy as anything other than a so-called Dancing Pony.