Downey Jr says he prefers playing Doom over Iron Man in MCU

Responding to the question of which MCU role he prefers to play, Robert Downey Jr. said, "I'll say Doom, for now." The actor, who previously played Iron Man, added that the upcoming 'Avengers: Doomsday' will explore a "key relationship" which is "exciting and unexpected and beautiful". Downey Jr will play the role of Marvel villain Doctor Doom in the film.