In a summer that's been jam-packed full of comic book movies, X-Men: First Class was an incredibly pleasant surprise, both critically and financially. As a result, it should come as no surprise to anyone that Fox is actively considering a sequel for the film.
According to The Geek Files: We've learned that the studio is "discussing sequels internally."
While there is not yet any formal announcement of a follow-up, it does show interest in continuing First Class rather than leaving it as a standalone origin tale. [SOURCE]
Is it a vain hope that Cyclops (Storm and Jean) actually appears in this one and given a sizable role? ...Okay, yeah, it probably is.