SPECIAL LOOK: Marvel Studios' Avengers: Doomsday

He used to be different. The stars of Marvel Studios’ Avengers: Doomsday took the stage at D23: The Ultimate Disney Fan Event to reveal a special look at the upcoming film, teasing the impending showdown between Doctor Doom ( Robert Downey Jr. ) and a multiverse worth of heroes. Downey was joined on stage by fellow MCU veterans Chris Evans and Hayley Atwell, who will be returning in the film as…