Director Bryan Singer hinted that he will be changing parts of the series established since his departure after X2.
When asked asked whether the time-travel story of the upcoming film would serve as a "reset" by HitFix, the Superman Returns filmmaker laughingly admitted that he would make some changes.
He declined to reveal what he wanted to get rid of, saying: "No, I shouldn't."
20th Century Fox's next X-Men movie will see the return of James McAvoy, Michael Fassbender, Jennifer Lawrence, Hugh Jackman, Ian McKellen, Anna Paquin, Ellen Page, Shawn Ashmore and Patrick Stewart in a tale that will apparently span two eras of the Marvel Comics setting.
Game of Thrones' Peter Dinklage has become the latest actor added to the cast, with rumours linking him to the role of Sentinel inventor Bolivar Trask.
X-Men: Days of Future Past will arrive on July 18, 2014.