As I said the earliest we would get a First Class sequel is 2013 which is not packed yet and it would have room to breath in. There's no way we're getting as sequel next year. They'd have to green light now and basically start casting and production in the next couple of months. That's not going to happen.
People here having been using "X-Men Second Class" lol which is pathetic in my opinion. I'm betting a sequel title will be called something else entirely. Anyways still too early to talk about this in my opinion. All I know is that the franchise is not dead yet and to my knowledge there are no plans to reboot anything (except Deadpool).