Robert Downey Jr. is returning to the Marvel Cinematic Universe as Doctor Doom in a new “Avengers” movie titled “Avengers: Doomsday,” which will be directed by Joe and Anthony Russo in their own return to Marvel. The directing duo is on deck to helm two new “Avengers” movie: “Doomsday,” which will introduce Victor von DoomDoctor Doom, and “Avengers: Secret Wars.”br br While Downey had said in recent interviews that he was open to returning to Marvel, fans naturally assumed that meant he would come back as Iron ManTony Stark. Downey’s return as the villainous Victor von Doom comes as a massive shock to the fandom, including the ecstatic audience at Marvel’s presentation at San Diego Comic-Con. Downey made a victorious appearance to Hall H on Saturday evening to reveal his return.