Chances are pretty good that you've already seen Avengers: Endgame and don't need this spoiler warning — but, as you no doubt know, Tony Stark doesn't make it out of Endgame alive. Since so much of the Marvel Cinematic Universe has been built around Stark and his armor-clad alter ego, his absence leaves a pretty big vacuum. But will it stay that way forever? Maybe...maybe not. Here's how Iron Man just might return to the MCU, in one form or another.