.Marvel is actually delivering the Russo Bros. back to direct the upcoming 2 Avengers movies The VergeRobert Downey Jr. Sets Marvel Rebound as Victor von Doom in 'Avengers: End Ofthe World' VarietyRobert Downey Jr. To Formally Return To The MCU As Medical Professional Ruin Forbes' Avengers' star Robert Downey Jr. returns to Marvel-- however as Doctor Ruin U.S.A. TODAYMCU's Physician Ruin Cast at Last for Avengers: Doomsday, and It's Robert Downey Jr. |SDCC 2024 IGN.