Richard Donner began shooting his vision of Superman II while concurrently filming Superman The Movie - his never-before-seen vision has a totally different beginning and resolution.
Gladiator
Avengers: Endgame
Terminator 2: Judgment Day
Avengers: Infinity War
Avatar
Pirates of the Caribbean: The Curse of the Black Pearl
Guardians of the Galaxy
Mad Max: Fury Road
Iron Man
Spider-Man: No Way Home