Parents need to know that "X-Men: Apocalypse" (the third film in the "X-Men: First Class" reboot series), pits the super-powered heroes against a mighty foe who's bent on nothing less than laying waste to the whole world. Expect plenty of superhero-style action violence; aside from one sequence with some disturbing slashing, it's not particularly gory, but it does involve lots of combat, destruction, and weapons.