According to ComicBook.com on Thursday, a clip was released for "X-Men: Days of Future Past" showing Professor Charles Xavier, played by James McAvoy, and Magneto, played by Michael Fassbender, traveling on a private jet. Most fans have been wondering why in the previous trailers that Professor Xavier was seen walking. In "X-Men: First Class" he gained his paralysis by taking a bullet for Erik Lehnsherr on an island as they were assisting in attempting to circumvent the Cuban Missile Crisis.
The explanation given in this recent clip talks about Xavier's ability to walk was due to the treatment he had been receiving for his injured spine. Magneto, being as accepting of such mutant gifts, was quite offended that his friend decided to compromise his powers in order to be upwardly mobile. In "X-Men: First Class" he always taught his cohorts to embrace their abilities, especially with his emphasis on influencing Mystique in doing the same when she wanted to at least take a drug to give her a more human appearance.
Professor Xavier spouts off at the losses he had to endure while Magneto countered by listing names of previous mutants from "X-Men: First Class". Names such as Angel, Azazel, Emma Frost, and Banshee were the ones that Lehnsherr considered to be the ones that Charles should have been protecting, but instead abandoned them.
There is also another "X-Men" sequel clip showing Mystique posing as a foreign military officer as Bolivar Trask enters the room with a device that has the ability to pick up a mutant presence in the room. The device goes off and Trask points it directly at Mystique. She reveals her true form as she takes out the members of the meeting and acquiring a hand gun and pointing it at the Sentinel inventor.
"X-Men: Days of Future Past" opens in theaters May 23.