.Marvel is actually carrying the Russo Bros. back to instruct the following 2 Avengers films The VergeRobert Downey Jr. Collections Marvel Return as Winner von Ruin in 'Avengers: Doomsday' VarietyRobert Downey Jr. To Formally Go Back To The MCU As Doctor Doom Forbes' Avengers' superstar Robert Downey Jr. goes back to Wonder-- however as Physician Doom USA TODAYMCU's Doctor Ruin Designated finally for Avengers: End ofthe world, and It's Robert Downey Jr. |SDCC 2024 IGN.