Fox has really moved things around to accommodate the release of Deadpool. 20th Century Fox has assigned a December 21, 2018 release date to an untitled Deadpool film, according to The Hollywood Reporter.
The Hollywood trade speculates the film could be a PG-13 edit of 2016’s Deadpool. An image of Deadpool inserted into a scene from the 80s family film The Princess Bride which was tweeted by star Ryan Reynolds fueled their speculation.
To make way for the Deadpool film’s release, Alita: Battle Angel will reportedly move to February 14, 2019 – which in turn will displace Dark Phoenix, the next installment in the X-Men franchise, which moves to a June 7, 2019 release date.
THR reports that Fox has also set a new release date for the long-delayed Gambit, which is now reportedly scheduled for March 13, 2020.
It is not clear how the Disney purchase of Fox, which is expected to be completed in late 2019, may affect these updated release dates.
My guess is that Fox is simply trying to put there best foot forward before the finalized deal with Disney and make as much money as possible.