2) Deadpool
You’d think that Deadpool being R-Rated will keep him away from the world of the X-Men, but considering the fact that the Merc With the Mouth’s first solo outing earned more than X-Men: Apocalypse, Fox must realize what an earner they have on their hands here.
Ryan Reynolds has already talked about how the character could fit into a PG-13 setting and having him censored could become a running joke suitable for a character who frequently breaks the fourth wall, so there’s clearly been at least some discussion of having Deadpool do more in this world.
With a sequel on the way and an appearance in that eventual X-Force movie highly likely, all Fox needs to do is having him make some memorable cameo appearances in the next couple of X-Men movies and they’ll have a brand new star on their hands (which they arguably already do without all that).
Deadpool could be used in a similar way to Logan, and while he would mostly be used as comedic relief, that may not be a bad thing for a franchise which has started taking itself a little too seriously. The thought of Deadpool interacting with the X-Men is also massively exciting.