Much of the Marvel Cinematic Universe was built on Disney and Marvel Studios not having access to some of the most popular characters in all of comics: the X-Men and the Fantastic Four. Now that Disney has finished its merger with 21st Century Fox, things are really going to change for the franchise, which has made several billion at the worldwide box office across 22 films.

One of the biggest additions to the MCU's roster is Doctor Doom, who is one of the most popular villains in the comics. This opens up a whole bunch of storytelling possibilities in the future, as Earth's Mightiest Heroes are going to need someone to focus their energy on.

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Check out the video below for more ways the Disney/Fox merger will change the MCU.

There's no indication yet as to when the X-Men and Fantastic Four will make their way to the MCU. As Marvel Studios tends to plan pretty far ahead, Marvel Studios President Kevin Feige has said it will be 'a very long time' before the X-Men appear. It's pretty likely that when these characters reappear, they'll be recast. It's unclear at this time how Deadpool will be incorporated, as Marvel Studios has typically produced films for a wider audience. However, there's some indication Deadpool might remain R-rated. 

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