The arrival of X-men AND Fantastic Four!

With the Disney/fox merger now a done deal, the multiverse clears the path for the X-men, Fantastic Four and Deadpool to join the MCU. Hailing from an alternate dimension is an easy way to explain where the hell mutants have been all this time; plus, the Fantastic Four are explorers as well as superheroes, so an alternate Reed Richards — one of the smartest men in Marvel comics — at the forefront of dimensional discovery makes sense. In any case, expect Deadpool to have a thing or three to say about it.