Robert Downey Jr.’s Doctor Doom will debut in the MCU before Avengers: Doomsday

Marvel finally confirmed what MCU fans have been dying to hear: Robert Downey Jr. is coming back to Avengers movies. However, he won't play Iron Man in Avengers 5, now titled Avengers: Doomsday. He'll be Victor von Doom, a big villain from The Fantastic Four comics and a character some people expected to see in the The Fantastic Four reboot.

RDJ should also appear in Avengers: Secret Wars. That's probably the whole point of bringing the actor back, even if he's seemingly playing a different character.