‘X-Men: Days of Future Past’ Trailer: It’s a Mega-Mutant Showdown‘X-Men: Days of Future Past’ Trailer: It’s a Mega-Mutant ShowdownThe highly anticipated 'X-Men: Days of Future Past' trailer has hit the web, highlighting the mega-mutant cast from both the original 'X-Men' trilogy and the 'First Class' batch.Nick RomanoNick Romano