Instagram/Jon Favreau & Robert Down TV Jon Favreau initially opposed Tony Stark's death in Avengers: Endgame, revealing his concerns about fan impact in a candid interview. April 26, 2026 AceShowbiz - The Marvel Cinematic Universe's early architect and actor Jon Favreau has revealed he was initially hesitant about the decision to kill off Tony Stark/Iron Man in Avengers: Endgame. From the launch of the MCU with Iron Man in 2008 to the emotional conclusion in 2019, Tony Stark's journey was central to over a decade of storytelling.