.Marvel is carrying the Russo Bros. back to direct the following pair of Avengers films The VergeRobert Downey Jr. Sets Marvel Rebound as Winner von Ruin in 'Avengers: Doomsday' VarietyRobert Downey Jr. To Formally Go Back To The MCU As Doctor Ruin Forbes' Avengers' superstar Robert Downey Jr. returns to Marvel-- but as Physician Doom USA TODAYMCU's Physician Ruin Designated at Last for Avengers: End ofthe world, and also It is actually Robert Downey Jr. |SDCC 2024 IGN.