Other than Magneto cant say I have much interest in any of those.
I always felt that a Magneto flick would be a waste of the resources it takes to make a movie. Besides, I sort of got the impression that the studio converted the rumored Magneto Origins movie into X-Men: First Class, no?
They did. Funny though that most people cite Magneto's Nazi hunting quest to be the best part of the film. With Fassbender, a whole film based on Magneto just might have worked.