Perhaps he, like Tony Stark, used time travel to defeat his reality's Thanos, saving the world from the Blip. And, it might have been Doom who secretly revealed the key to time travel to Tony Stark.

In Iron Man #55 (1973), Tony Stark faced his first cosmic threat, marking a turning point in his adventures. Previously battling spies and rogue scientists, he now encountered Thanos, who would be ...

There are so many ways to interpret it – the most logical being that Iron Man and Doom are both deep, complex characters – but also that there’s some kind of connection between them.

Only one of the two Thanos versions is dead. The one whom Thor (Chris Hemsworth) cut his head early in the movie. The other one turned to dust at the end of Endgame, when Tony Stark got a hold of ...