Iron Man's post-credits scene is one of the most pivotal moments in the history of superhero films, but a slightly alternate version of Tony Stark's first interaction with Nick Fury would have made things very different for the MCU. Now considered the first film in what would become the Infinity Saga, Iron Man was far from having the same ambitions that recent superhero movies have. On the contrary, as stated by Kevin Feige, Jon Favreau's film was primarily focused on getting the character right and being profitable for the studio.
That didn't stop Iron Man from setting up some elements in the case of future sequels. The decision proved to be the right one, as the great reception of both the movie and Robert Downey Jr.'s portrayal of Tony Stark assured that Iron Man would be the beginning of a new universe. However, moments like Rhodes' «next time» and the mention of the Avengers initiative are small compared to what was left out of the film.
Related: Black Panther 2 Will Replace RDJ's Iron Man In 2 Different Ways
Had Nick Fury’s mention of a wider universe of superheroes stayed in the movie, then the MCU as audiences know it today probably wouldn’t exist. That's not to say it would be better or worse, just very different. Although the MCU has adapted some of the most important Marvel stories for the screen, the franchise had to restrict itself to using only the Avengers universe in its stories, and elements such as mutants or Spider-Man became simply non-existent. In a what-if scenario in which Iron Man's original post-credits scene would have been kept, however, Iron Man and the Avengers would have been just one part of a much more complex puzzle involving other Marvel superheroes.
Iron Man's post-credits scene was
Read more on screenrant.com