Iron Man 4

Iron Man 4 was a planned sequel to 2013's Iron Man 3 and would have been an installment in the Marvel Cinematic Universe.

Plot
Unknown

Why It Was Cancelled

 * 1) 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
 * 2) A War Machine spin off was also in the works but it too was cancelled.
 * 3) Tony Stark would be killed off in Avengers: Endgame.

Results

 * Robert Downey Jr will reprise his role in the currently delayed Black Widow film.


 * The film was cancelled and the iron man franchise is a trilogy