Re: 'X-men: DOFP' Official CAST Thread (announcements and discussion)
The four main characters of First Class were about 80% of that movie and everyone else (bar Shaw) were trimmings, including Banshee and Havok. So it's not exactly surprising that they're not appearing in a film that's set 11 years later and is not tied to that whole 60s era anymore.
What's disappointing is that now they'll just fill the movie with new characters who are not likely to get much development in this busy movie and will probably be never seen again. Again. If you need background characters why not keep the ones who have already been introduced and who already have some history with your main characters?