
Following a series of individual superhero movies, viewers began to realize Marvel was building towards a large team-up film, similar to the comic books. While the first X-Men movie featured a team, the huge success of The Avengers truly opened the door for more ensemble films within the Marvel Cinematic Universe, like Guardians of the Galaxy and, more recently, Thunderbolts. The MCU expanded beyond single-hero stories, incorporating crossovers in movies such as Spider-Man: Homecoming and Thor: Ragnarök to create more exciting events. However, not all planned team-up movies have been made; one in particular, if completed, would have significantly changed the direction of the franchise before Marvel canceled it ten years ago.