I know it's too early to ask seeing as how the movie has yet to be released but I have a strange feeling that he won't be. I've noticed that the X-Men movies seem to meddle with blood relations now and then. Like The relationship between Mystique and Nightcrawler. In the comics and cartoons they are mother and son but in the movies, well it's kinda complicated. They have one scene together in X2 and that's it. In X-Men First Class we meet Nightcrawler's father who is basically a red Nightcrawler (I'm sorry I can't really remember his name) and he and Mystique join up with Magneto in the end and I can only assume that off screen they conceive Nightcrawler. Other examples are that in First Class Professor X and Mystique are siblings (Mystique being adopted that is) and I don't think that has ever happened in past X-Men stories, Professor X and Juggernaut not being step siblings (heck Juggernaut seems to be a mutant in this version) and Wolverine and Sabretooth being brothers. So I guess I wouldn't be totally surprised that the new movie would not have Magneto and Quicksilver as father and son but would that disappoint anyone? As long as the movie is good I guess I wouldn't care too much, much like how Quicksilver and Scarlet Witch's origins seem to be changed in the upcoming Avengers: Age of Ultron movie, though I'm still a little concerned about that but that might change.