We at Major Spoilers have discussed the trend of directors heading to social media to show behind the scenes images and make announcements and it has happened once again. X-Men Days of Future Past director Brian Singer headed over to Vine to let us know Bishop and Warpath will be in the film.
— Bryan Singer (@BryanSinger) April 24, 2013
As for the actors who will be filling those roles, that is still up in the air for speculation. Twilight star Booboo Stewart is the only Native American listed on the casting sheet so it would make sense for him to fill the role of Warpath. Omar Sy has been rumored to be playing Bishop before, but, again, none of this is official.
X-Men: Days of Future Past is schedule for release July 18, 2014.