Total rumor and probably b.s., but would explain why Ryan is teasing X-Force on Twitter if true...
https://www.msn.com/en-us/movies/new...84eda883&ei=35
Deadpool and Wolverine along wouldn't be able to kill Magneto, Xavier and the rest of the FOX-men gone bad so would need some help. Enter the X-Force... Deadpool, Cable, Domino, Cable, Copycat, Colossus. Maybe? Not sure how effective three of these folks would be against Erik (Logan, Nathan or Piotr) considering, well, the amount of metal in their bodies. Perhaps we'll get a Fatal Attractions scene with Magneto ripping Cable in half, or tearing Logan's adamantium out of him?