The sequel to 2011's X-Men: First Class is officially titled X-Men: Days of Future Past. The movies producer Bryan Singer stated to IGN: "It's called 'Days of Future Past', It deals with aspects of that comic, but also some very new things." The comic book storyline, "Days of Future Past" ran in Uncanny X-Men #141 & 142 in 1981 during Chris Claremont & John Byrne's run. The synopsis of the Days of Future Past comic book story arc is as follows, "The storyline alternates between present day, in which the X-Men fight Mystique’s Brotherhood of Evil Mutants, and a future timeline caused by the X-Men’s failure to prevent the Brotherhood from assassinating Senator Robert Kelly. In this future universe, Sentinels rule the United States, & mutants live in internment camps. The present-day X-Men are forewarned of the possible future by a future version of their teammate Kitty Pryde, whose mind traveled back in time and possessed her younger self to warn the X-Men. She succeeds in her mission & returns to the future, but despite her success, the future timeline still exists as an alternative timeline rather than as the actual future."