X-Men: Days of Future Past: Featurette and Opening Battle clip released

As part of the ongoing promotions before the movie hits next month, 20th Century Fox and Marvel have released a new featurette and a first look clip at the "Opening Battle" that'll be part of Bryan Singer's return to the X-Men Movie franchise with "X-Men: Days of Future Past"!

Courtesy of CBM Trailers, here's the featurette and the opening battle clip.

X-MEN: DAYS OF FUTURE PAST - Official Featurette #1
X-MEN: DAYS OF FUTURE PAST - Official "Opening Battle" Movie Clip #1
X-Men: Days of Future Past opens in the US on May 23, 2014.