After the Battle of Ultron, world threats died down. Sure, there was the occasional villain, but they didn't leave a dent. With your amazing power of immortality, reactive evolution, and power mimicking, you are needed all over the world so you can help as many people as possible. However, your home is with the Avengers. There is a catch with your powers, though, like most things that are insanely powerful. This catch causes a lot of problems when a past lover comes back into your life, and the world is in immediate danger.
Another one of Starks failed experiments causes a rift in Universes causing their Actor selves from another Parallel Universe to come through. Steve has to face Hayley, the women that looks like the girl from his past, Tony has to deal with another him & you have to put up with another set of Avengers.
*Uploaded STRAIGHT from Tumblr. MY OWN FIC. If you see this anywhere else on this site, it isn't theirs. This is Originially MY story*