Is 'Days of Future Past' the next X-Men Movie?

20th Century Fox has filed an interesting title with the MPAA for the next X-Men movie... Days of Future Past!

I know, I know! It's one of their most popular stories ever! I'm a tad bit worried about this.

Blastr talks about the discovery:

The studio has filed the title Days of Future Past with the MPAA for an unidentified future project—and as any X-Men fan knows—that's also the title of a popular comic arc from 1981. 

The two-issue arc delved into a dark potential future, where mutants are kept locked up in internment camps. Future Kitty Pryde sends her mind back to present-day Kitty Pryde, and the X-Men jump in to help prevent the anti-mutant future.

Is this a way to reboot the entire storyline or will this be an All-New, All-Different X-Men?