It might be more accurate to just say that Marvel has all of the merchandising rights, but yes Disney does own Marvel entirely.
There's no way we're getting anything for Apocalypse, even in comic-set form like we did for Days of Future Past. That set came out about the same time as the movie, not after based on how well the movie did.
I'm guessing a part of the reason is that Marvel is starting to put out more and more of its own movies, and Lego is starting to produce at least one set per movie (a trend that I should hope will continue--GotG2, Spidey, and Thor 3 next year? :D ), so even if Marvel/Disney didn't mind a little Xmen merch, Lego has plenty of other stuff to flesh out its waves.
Edit: Sorry, started typing before Nemo had posted. Takes a while in mobile :P Feel free to delete this post if it's too off-topic.
On Hawkeye: am I the only one considering just giving him both of Superboy's arms (since I dunno what other 'fig I'd give just one short sleeve) and maybe even blond hair to make a more comic/animated show look? Either way, I'm psyched for that torso, and the legs are generic enough to find plenty of uses for--not that they look bad on Hawkeye. Can't wait to get a better look at Spidey ^_^