I have no interest in this movie (I think me liking X-Men: First Class was a bit of a fluke, 'cause I have not liked any other Matthew Vaughn movie I've seen and this looks like more of the same to me), so maybe I'm coming at this from a bit of a detached perspective, but I wouldn't really call any of what's posted above a "plot twist." It's the core concept of the movie, the premise you're signing up for when you buy your ticket.