After taking a vacation to Hawaii, director Bryan Singer has started work on editing X-Men: Days Of Future Past. Earlier today, Singer tweeted the photo above, along with the text, "Back in the cutting room!" What's most interesting is that the scene that Singer is editing shows the sign for Xavier's School for Gifted Youngsters laying on the ground amidst overgrown grass. Singer certainly seems to be teasing the destruction or abandonment of Xavier's school. X-Men: Days Of Future Past stars James McAvoy, Michael Fassbender, Patrick Stewart, Ian McKellen, Hugh Jackman, Jennifer Lawrence, Nicholas Hoult, Ellen Page, Halle Berry, Peter Dinklage, Anna Paquin and Shawn Ashmore. X-Men: Days Of Future Past is scheduled to be released in movie theaters on May 23, 2014.