Of course, even if an announcement is made that Disney is picking up 21st Century Fox, there’s no telling how that will actually impact the Marvel and X-Men movies, or when.
Hugh Jackman may have had to hang around for several years in order to play in the MCU, so he probably made the right call.
It’s going to be a year before those films run their course and it’s unlikely we’d start to see anything crossing over until after that.
Depending on how far along Marvel is with Phase 4 planning, it could be even longer if Marvel decides it doesn’t want to change things to incorporate the X-Men immediately.