Hey, remember when dancing heartthrob Channing Tatum was going to play Gambit in a solo X-Men spinoff film? I’d totally forgotten about it, too! Obviously, the film is no longer going to happen (it was originally announced way back in 2014), but Dark Phoenix director Simon Kinberg recently revealed some interesting information about what the movie might have been like. Specifically, fan-favorite villain Mister Sinister was going to appear. During a special watch-along event of X-Men: Days of Future Past with IGN, Kinberg let it slip that the end credits sequence from X-Men: Apocalypse …