Iron Man 4 was a planned sequel to 2013's Iron Man 3 and would have been an installment in the Marvel Cinematic Universe.
Why It Was Cancelled
- Robert Downey Jr expressed interest in making a fourth film and wanted Mel Gibson to direct and he was also interested but the project never prevailed
- A War Machine spin off was also in the works but it too was cancelled.
- Tony Stark would be killed off in Avengers: Endgame.
- Robert Downey Jr will reprise his role in the currently delayed Black Widow film.
- The film was cancelled.