Before Disney got serious about acquiring 21 Century Fox and back when Tim Miller was primed to shoot Deadpool 2 (before he went to go shoot the next Terminator film instead) the totally NOT Fantastic Four from the 2015 film were supposed to cameo in the Deadpool 2.
Concept art, as seen above, was made for the super-team to appear for the second time as apart of the planned X-Men/Fantastic Four Fox/Marvel shared universe. Before everything was eventually canned. As work began on the sequel Ryan Reynolds and Tim Miller had strong creative visions for where the franchise should go. This ultimately led to Miller leaving and John Wick director David Leitch taking over.
Per Comic Book News:
This past weekend, concept artist Alexander Lozano shared some of the artwork he had drawn for Tim Miller’s version of Deadpool 2 before the creator left the project. Not only did the artwork feature comic book-accurate looks for Cable and Domino, it also revealed that the Fantastic Four were supposed to appear in the film. Knowing this, we can’t help but wonder what Miller’s Deadpool 2 might have been like — and, more importantly, could it have brought redemption to Fox’s much-maligned Fantastic Four franchise?
I like to think this Fantastic Four would have been put in place of the X-Force assembled in Deadpool 2 and they would have shared the same comedic ending they did.
Fantastic Four (stylized as FANT4STIC) is a 2015 American superhero film based on the Marvel Comics superhero team of the same name. It is the third theatrical Fantastic Four film to be produced and distributed by 20th Century Fox and a reboot of the Fantastic Four film franchise. Directed by Josh Trank, who co-wrote the screenplay with Jeremy Slater and Simon Kinberg, the film stars Miles Teller, Michael B. Jordan, Kate Mara, Jamie Belland Toby Kebbell. In Fantastic Four, the team must learn to harness their superhuman abilities gained from an alternate universe to save Earth from a friend turned enemy. The film failed to find an audience and hated about as much as the first interpretation of Deadpool from X-Men Origins: Wolverine.