In a surprising turn of events, Robert Downey Jr. reprised his iconic role of Tony Stark, albeit not as Iron Man, for the third installment of the Captain America series. Initially perceived as a standalone Captain America movie, "Captain America: Civil War" evolved into a massive ensemble film, thanks to Downey's involvement. Downey's decision to return to the Marvel Cinematic Universe (MCU) was pivotal in transforming the movie into a billion-dollar franchise, despite its initial title of "Captain America: Serpent Society."
The Russo Brothers, renowned directors within the MCU, took the helm of "Captain America: Civil War" following an announcement at a 2014 Marvel Event. Marvel Studios President Kevin Feige revealed the initial title of the film as "Captain America: Serpent Society," which did not highlight Captain America's character. However, the inclusion of Downey shifted the dynamics, turning it into a significant crossover event involving numerous Marvel characters.
At the time, Robert Downey Jr. was believed to be out of contract with Marvel. His return was contingent upon meetings with Disney CEO Bob Iger and Kevin Feige. Downey was eyeing a more complex role rather than simply reprising Iron Man. The result was a lucrative deal that extended beyond "Civil War," encompassing future films like "Avengers: Doomsday" and "Avengers: Secret Wars," where he is set to portray the villainous Doctor Doom.
"In a movie that wasn’t even titled after his character. And it was the pitch of our lives. And he said, 'Yes, let’s do it.' He liked the risk, to Robert’s credit, and that choice led the explosive upside to Infinity War and Endgame." – Joe Russo
Downey's agreement to return under these conditions catalyzed significant narrative decisions and character developments within the MCU. His portrayal as Doctor Doom in upcoming Avengers movies marks a notable shift from his previous hero persona, adding layers to his involvement in the MCU.
"Captain America: Civil War" also marked the introduction of Spider-Man into the MCU, fulfilling long-held fan dreams. The film's success was not replicated by its sequel, "Captain America: Brave New World," which could not maintain the momentum generated by Downey's involvement.