In the comic the Exiles about reality hopping super heroes they encounter a veriety of worlds with various versions of our favorite heroes. However most of the time the avengers end up evil or killed by whatever the exiles are trying to prevent. Anyway there is a second team called weapon x made up of i guess you could say darker characters. One of these characters on weapon x was Tony Stark, the armor he was wearing was very close to the hulkbuster armor. Anyway in his world, he ended up causeing a weapons race in an attempt to protect the world. However this backfires causeing WW3 and stark ends up becoming the worlds most wanted man and is to be executed upon capture. Now I'm thinking maybe this world that version of stark came from is not an alternate reality but a time loop.Inother words the events on his world are the future of 616. Think about it, he becomes powerful enough to actually start an arms race, which at this point he does in 616. The hulk buster armor and the third world war. I'm startign to think, what if this world is 616's future.
Hulk will return and after conventional weaponry and the heroes cant stop his wrath, stark dcides to up the anty and starts using stronger and stronger weaponry, while other contries do the same out of fear. Eventually all this backfires causeing global destruction and making stark the worlds most wanted man.