20th Century Fox released this synopsis for X-Men: The Last Stand, due in theaters on May 26:
"In X-Men : The Last Stand, the final chapter in the "X-Men" motion picture trilogy, a "cure" for mutancy threatens to alter the course of history. For the first time, mutants have a choice: retain their uniqueness, though it isolates and alienates them, or give up their powers and become human. The opposing viewpoints of mutant leaders Charles Xavier, who preaches tolerance, and Magneto, who believes in the survival of the fittest, are put to the ultimate testâ€”triggering the war to end all wars."
They also recently posted a new trailer on the official movie site: http://www.x-menthelaststand.com/