According to Cinema Blend on Thursday, "True Blood's" Anna Paquin was seen briefly in "X-Men: Days of Future Past", however, there was an entire subplot involving Rogue that never made it into the movie. Though she was seen in the trailer, director Bryan Singer was insistent on the southern belle not being in the final cut. The final scene of the film reveals Logan coming across her and Shawn Ashmore's Iceman character.
Screenwriter Simon Kinberg had written the deleted subplot and had explained the situation during an interview while he was on set with Fox's "Fantastic Four." He discussed the details of Rogue's absence from the "X-Men: Days of Future Past" film. In fact, the sequence more involved Professor Charles Xavier, as played by Patrick Stewart, and Magneto, as played by Ian McKellen. It would've entail one final adventure together to go out and acquire Rogue.
"I wanted to create a subplot for old Charles and old Eric — Patrick [Stewart] and Ian [McKellen] — to have a mini-mission together, one final adventure. And that’s what the Rogue sequence was — that they went to retrieve Rogue."
In addition to this, during the scene where Kitty Pryde, played by Ellen Page, was in constant contact with Wolverine's mind and was deeply cut by Logan in the process, Rogue would then make her appearance. For those not familiar with the character, Rogue has the ability to absorb other mutants' powers and be able to use them for herself. In this scene, she would've touched Logan with one hand as he was unconsciously back in time whilst using his powers to heal Kitty Pryde with Rogue's other hand.
It is thought that the wounds administered to Kitty Pryde would have played a significant role and this would also mean more screen time with Stewart and McKellen. It would have also been well worth it and the time spent on the narrative an achievement, however Kinberg took one issue with with the scene.
"It felt like it didn’t come from the spine of the film, it was an appendage where I just wanted to see the old guys get in the X-Jet for one last ride. It was a narrative detour, and in a film with this much momentum and narrative flow, you can’t afford any detours."
If one thinks about it, it would not have been much of a tangent from the plot. In actuality, it looks like it could have filled the already existing plot holes in the film. Considering the Kitty Pryde character hadn't much of a significant role in the film that never went beyond "sidekick" status or a new love interest for Iceman, some may have considered the filmmakers had partaken in some kind of cruelty to Pryde as she bled profusely while she was in constant contact with Logan the entire mission.