I feel a bit more trollish than most here.
I'd have Crossing Tony show up using Kang's time travel tech and recruit Hydra Cap, Ultron Pym, and Maestro. They use the Inversion tech from AXIS on Janet and Tony erases Thor's memories back to the point where he was King Thor. So with the exception of Maestro, they're literally the original Avengers of this timeline and they're all evil despots.
Cue Civil War 3. Except this time, the original Avengers and Cap are the bad guys. And Steve 2.0, Tony 2.0, Jane, Scott, Bruce, and Nadia go after them.
Throw in some surprise alliances with Magus, Dark Raider, Onslaught, Dark Beast, etc. I basically imagine there being an Illuminatti Crossing Tony has going on the side with evil versions of the greatest minds in the Marvel Universe.
Now, obviously, you don't end on that rather sour note. But you have this rather twisted setup where the bad guys are mostly the actual originals, flanked by a few evil twins plucked from history of the ones they can't recruit.