I hope we get answers on this stuff by the time New Mutants and Deadpool 2 come out.
Kitty Pryde ain't happening till 2020 or 2021 at the earliest. Honestly, here is what I hope happens. Marvel/Disney realizes (as anyone should) that the X-Men franchise is vast, marketable and can have their own brand. We get all these X-films under a new X-Men Marvel label, which can still be open for big event crossovers in the MCU if need be, like say Secret Wars or whatever.
Miller has a great relationship with Marvel/Disney, preferably I'd want a Kitty Pryde film to have a life beyond a one shot. Or I would love a Kitty Pryde film to lead to her joining a new cast with present time X-Men.
What I don't want is Fox at the last minute grasping for whatever they can, and I don't think that will happen.