Avengers: Doomsday‘s directors have teased Doctor Doom’s story, and their latest comments make the Marvel Cinematic Universe return of a few characters necessary. Robert Downey Jr.’s casting as Victor von Doom is the biggest question the Multiverse Saga has to answer at the moment. So far, Marvel has yet to explain how Avengers: Doomsday‘s story will make it possible for the Iron Man actor to now play the main villain of the MCU’s Multiverse Saga.