Rumour Fox Are Working On A Potential 'Fantastic Four' and 'X-Men' Crossover
According to Latino Review, Fox could be possible working on a Fantasric Four and X-Men crossover which could see a 2018 release. That plan is contingent upon a couple of things, however. First they have to see how Josh Trank‘s Fantastic Four reboot fares with audiences this year, and then see how Bryan Singer‘s X-Men: Apocalypse does with its new recruits.
Latino Review also mention this is "far from a done deal."