The second trailer to the new X-Men film is out. This one offers a more detailed look at a film that promises to be an awesomely epic superhero film. Directed by Bryan Singer (X-Men, X2: X-Men United), X-Men:Days of Future Past features cast members from all of the X-Men films, including the X-Men: First Class prequel. The film opens in theaters May 23, 2014.