X-Men: Days of Future Past was a major critical and financial success for Twentieth Century Fox and director Bryan Singer in 2014, and offered a (somewhat unsuccessful) attempt at spring cleaning the series continuity. Thanks to the intersection of past and future timelines, there was a lot of story to get through in X-Men: Days of Future Past and a limit to how long people could be kept in theaters.
One of the casualties of this was Anna Paquin's role as Rogue, which was completely cut from the theatrical version of the film (though Rogue does get a tiny cameo). Luckily for Rogue fans, the character's lost scenes will be featured in an extended cut (nicknamed the 'Rogue Cut') of X-Men: Days of Future Past on the upcoming Blu-ray.
We already knew that Rogue's story must have been reasonably substantial, and now Singer has confirmed this by revealing on Twitter that the Rogue Cut will be over 17 minutes longer than the theatrical version, and will also include, "a few little changes I made." This contradicts a recent report by Digital Spy - based on the Blu-ray's BBFC listing - which claimed that the Rogue Cut is only 11 minutes and 11 seconds longer than the original version.
Assuming that Singer's claim is correct (and let's face it, he would probably know), the extended cut of X-Men: Days of Future Past will be about 148 minutes long. The BBFC also states that the Blu-ray is set for release on July 13th (in the UK, at least).
Screenwriter Simon Kinberg offered a decent idea of what Rogue's storyline is in a previous interview. It involves a mission for the older versions of Charles Xavier and Erik Lensherr, who have to track down Rogue when Kitty Pryde starts weakening in her efforts to maintain Wolverine's psychic journey to the past. Since no one else has the same powers as Kitty, the only solution is for Rogue to absorb her powers and then take over. In order for that to happen, however, Charles and Erik have to find Rogue and rescue her from a "dark scary place." Kinberg was of the opinion that removing this storyline was the right decision.
"It’s a really nice sequence... But it does not service the main story. I thought it would increase the urgency and the stakes of the plot in the future, but it actually does the opposite, because it makes you feel like there is an answer out there. You think once Rogue gets here, we’ll have an unlimited amount of time. The ticking clock that we’d established with Kitty getting wounded and losing her powers… well, Rogue would show up and press stop on the clock. So for all of those narrative reasons, there was this ten-minute subplot that had to go."
Again, note that Kinberg refers to it as a "ten-minute subplot," which matches the Digital Spy report rather than Singer's tweet. Between the two accounts, it sounds like Rogue's subplot will be about ten minutes long and the other seven minutes will be made up of various assorted scenes that didn't quite make the original cut.
The extended cut of X-Men: Days of Future Past will be available on Blu-ray later in 2015.
Source: Bryan Singer