With the success of The Avengers and the Marvel Cinematic Universe, other studios have understandably gotten jealous and seen how they can capitalize on the success of a cohesive superhero universe of their own. Warner Brothers obviously has a hold on the Justice League and all those characters, but Fox said that theyd like to also do a cohesive universe. The problem with that is that while both the X-Men and the Fantastic Four, the two properties they hold the licenses to, are both Marvel properties, they dont lend themselves as well to a cohesive universe feel as the Avengers or the Justice League. But one thing the X-Men license does have is a whole lot of characters. Hundreds, in fact. And the X-brand got so popular in the 80s and 90s that it saw the release of a number of spin-off titles featuring teams composed of lesser-known characters, titles such as Excalibur, X-Factor, Generation X, the New Mutants and its successor, X-Force. Recently, Fox made a surprise announcement that an X-Force film is in development. The question, of course, is which X-Force? The team has been applied to a number of different groupings, but creator Rob Liefeld stated on Twitter that it was his version. Which Im fine with, X-Force may not have gotten off to the greatest start, but over time, it evolved into an underrated gem of the Marvel Universe.