.Wonder is actually bringing the Russo Bros. back to instruct the next two Avengers films The VergeRobert Downey Jr. Collections Wonder Rebound as Victor von Doom in 'Avengers: Doomsday' VarietyRobert Downey Jr. To Officially Return To The MCU As Doctor Ruin Forbes' Avengers' star Robert Downey Jr. goes back to Marvel-- however as Medical Professional Doom USA TODAYMCU's Physician Doom Cast finally for Avengers: Doomsday, and It's Robert Downey Jr. |SDCC 2024 IGN.