I hope that FF VS X Men Crossover never happenes. Besides just focusing on proving they can actually make a decent FF film, the FF should only cross over into a SS film. Crossing over FF and X-Men is just screaming we are desperate for Avengers money. And it wont work. Multiple X Films that build up and crossover into AOA is a much stronger way to go about any sort of crossover for X-Men. Theres actual reasoning for it with how large that world and story is.