Jon Favreau admits he was 'wrong' to object to Iron Man's death Jon Favreau admits he was "wrong" in his resistance to killing off Robert Downey Jr's Tony Stark in Avengers: Endgame. 22 April 2026 Jon Favreau admits he was "wrong" in his resistance to killing off Robert Downey Jr's Tony Stark in the Marvel Cinematic Universe (MCU).