"On the other hand, we couldn't finish making Avengers: Doomsday in May, so it had to be moved to December." Feige confirmed that Avengers: Doomsday and Avengers: Secret Wars are drawing heavily from Jonathan Hickman's work. Of course, the biggest surprise is still Robert Downey Jr. stepping into the role of Doctor Doom. "When we were casting for Doctor Doom, we said: we need to find the greatest actor in the world. It sounds like a story built around impossible choices, colliding realities, and Doctor Doom standing at the center of it all.