.Marvel is actually delivering the Russo Bros. back to instruct the next pair of Avengers films The VergeRobert Downey Jr. Sets Marvel Return as Winner von Doom in 'Avengers: Doomsday' VarietyRobert Downey Jr. To Officially Go Back To The MCU As Doctor Ruin Forbes' Avengers' celebrity Robert Downey Jr. comes back to Marvel-- however as Doctor Doom USA TODAYMCU's Medical professional Ruin Cast finally for Avengers: End ofthe world, and also It is actually Robert Downey Jr. |SDCC 2024 IGN.