One thing that wasn't made clear when Fox announced their Deadpool movie was whether the character would be a part of the X-Men cinematic universe. It seemed to me like it would be the kind of movie that would stand on its own, but it doesn't sound like that is the case at all. X-Men: Apocalypse writer and producer Simon Kinberg has confirmed otherwise.
"There’s definitely a sort of overall plan that we’ve all been talking about for the X-Men universe now, and Deadpool obviously fits into that. So yeah, I guess I would say it's part of certainly an overall timeline and thought process that goes into these films, some of which is inspired by the comics and some which is inspired by seeing what Marvel’s done with telling a larger tapestry and linking all those movies together, even as they stand independently as well. The same kind of thought is going to go into these X-Men movies at Fox."
It's going to be really interesting to see how exactly they fit him in with these X-Men movies, especially after the studio completely ruined his character in X-Men Origins: Wolverine. The original script for the Deadpool movie is detached from the main X-Men movie universe, and it even makes jokes at the expense of the Wolverine Origins film. Tim Miller is directing the movie, and Ryan Reynolds is expected to reprise his role after eight years. It's really exciting to know that a Deadpool movie is happening. I really hope the make it right, and to do that, they need to break the fourth wall.
Deadpool is set to be released February 2nd, 2016.
Source: Comic Book