I guess the most polite way to phrase this would be....
Bryan Singer is twisting the would be truth into a pretzel on "Twitter." Nothing new to him.
No one has signed any contracts for "X-Men: Days of Future Past." Not Patrick Stewart, not Ian McKellan, not Hugh Jackman.
It's blatantly obvious at this point that Bryan Singer is no longer a theatrical film director of any sort in Hollywood because in my personal opinion, "Superman Returns" killed his career in Hollywood. So, he is now just making up stories on "Twitter" and through fake press releases (primarily with Universal Studios) that he is still in the game and attached to big, tent-pole projects when in fact he isn't.
Bryan Singer needs to quietly come to the terms of defeat with himself, and quietly move on to directing smaller projects for television, such as sitcoms and ice cream commercials.
It isn't fruitful for Bryan Singer in any way when the general public keeps noticing that every theatrical project he announces (and quite a few television projects as well) never comes to fruition. He is only hurting himself. Bryan Singer needs to stay away from fake press releases from here on in. He is only injuring himself in the long run with them.