I don't even think the box office is dead a little. The movies that came out this weekend weren't exactly the most interesting. But look at this year alone and what it's done. Star Wars, Zootopia, Jungle Book, have all done fantastic. Also yes I know SW was technically released last year but it grossed most of it's money in 16. X Men has never been as big of a franchise as the rest of the Marvel Universe, and the first Alice movie was definitely helped by the fact that Burton was waaaay trendier back in 2010. And furthermore neither of them are reviewing well which while it doesn't count for everything counts for a bit.
But I'm enjoying watching this thread burn to the ground.