A Geeky Viewpoint

When X-Men: Days of Future Past is released for home Video there will be two versions of the movie available, the Theatrical Release and a longer extended version.   How much longer, well that's to be determined but at least 20 minutes...

Simon Kinberg, Producer and Writer of the Film, spoke about this on the Red Carpet at multiple premieres of the film.   

There are multiple scenes and secondary storylines that were cut from the film to create a more defined film according to Kinberg.   What makes this unusual is that a number of scenes are special effect laden and Fox is working to finish those scenes for the Extended edition in the same manner and quality as the those in the theatrical release.  Including a major fight scene involving Anna Paquin's character Rogue which was cut from the movie. 

Rumor suggest Director Bryan Singer, who due to his current legal issues is not on the road promoting the movie, is back in Hollywood screening the unused scenes and b-roll material in to determine what's in and what's out.