I just saw X-Men. I'm hoping that the next movie will deal us some flashbacks of exactly what happened to Xavier's and Magneto's teams. (SPOILER)Emma, Angel, Azazel, and Riptide were captured, obviously, but how? Did they go down one-by-one or all at once during an assault led by Erik? What about the others? I may have blinked a bit when (SPOILER)Mystique was looking at the pictures in Trask's lab but I don't think the question of what happened to (SPOILER)Banshee was ever truly answered. We know that (SPOILER)Havoc was drafted. Is he coming back?

There's also question as to the correlation between Days and the rest of Logan's history. If (SPOILER)Emma is dead, then who was that girl in (SPOILER)Origins? Obviously, the simplest explanation is that despite splicing scenes from the past movies into Logan's memory flashes, those movies are not canon with the story of First Class and Days of Future Past. But I'm personally hoping that the stinger's introduction of who I assume is the past incarnation (as a pharoah) of (SPOILER)Apocalypse will provide a canon explanation for the existence of (SPOILER)two Emmas... that being two mutants who can turn their skin into diamond perhaps in saying she was resurrected in a younger body which is supposedly within his span of power. It is somewhat difficult to imagine how a movie/story featuring (SPOILER)Apocalypse can precede the original trilogy chronologically. I suppose the in-story explanation would have to be that Xavier uses Cerebro to erase the event from the memories of people all across the world.

Another question that arose at watching First Class that hasn't been answered is that Beast designed and built Cerebro... but in the original X-Men movie, Xavier told Logan that Erik helped him build it. I'm hoping the next movie shows Cerebro being destroyed and, of course, being needed for the plot, Magneto helps to re-"build" it. That's the only explanation left to satisfy the question, imo.