Director Bryan Singer has confirmed via his Twitter that Hugh Jackman is officially on board to reprise his role as Wolverine in X-Men: Days of Future Past. Of course Jackman is going to reprise his role! He loves the Wolverine character!
Days of Future past is a sequel to X-Men: First Class, but due to the time travel elements of the story other characters from the previous Singer films will be included in the story. Patrick Stewart and Ian McKellen were previously confirmed by the director to reprise their roles as Charles Xavier and Magneto. First Class stars James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult will also all be back for more. It will be interesting to see what other cast members Singer is looking to have join the film. I've heard rumors that James Marsden is being talked to about coming back as Cyclops, and I hope that's true! His character should have never died, and by playing with the whole time travel thing, that could be reversed.
The sequel is based on 1981's Uncanny X-Men which came from writer Chris Claremont and artists John Byrne and Terry Austin. The story is set in an alternate future where surviving mutants have been thrown in concentration camps, Sentinels are patrolling America, and most of the X-Men have been hunted down and killed. The present day X-Men are forced to stop a key event from unfolding in order to keep that future from occurring.