The Russo brothers have revealed Jon Favreau called them to urge them not to kill off Tony Star/ Iron Man in 'Avengers: Endgame'.
Russo Brothers Reveal That Jon Favreau Argued Against the Decision to Kill Iron Man | THR News
Both Anthony and Jo Russo revealed they had to talk the 'Iron Man' director "off of a ledge" after he told them the hero's death..
The Hollywood Reporter