A Hugely Popular Fan Theory Offers A Viable Way For Deadpool To Enter The Marvel Cinematic Universe 20TH CENTURY FOX  Now that Disney is in control of 20th Century Fox’s cinematic properties, this means that Marvel Studios, a Disney subsidiary, has repossessed many of its characters and properties that were previously licensed to the rival company. The X-Men and the Fantastic Four are two of the more popular instances of this, but Ryan Reynolds’ hugely successful Deadpool franchise is also a contender.