FOX isn't wasting any time glowing in the success of X-Men Origins: Wolverine, instead they're already planning another franchise film.
The film will be a development deal for Candian star Ryan Reynolds who will reprise his role as "Deadpool".
According to Variety:
The character is one of the most popular in Marvel Comics' X-Men universe. Deadpool is Wade Wilson, a mercenary who, dying of cancer, submits himself to the Weapon X genetic alteration experiment and emerges as an indestructible semi-sane anti-hero. Reynolds seemed destined to play the character. In one reference in the Marvel Comics, Deadpool is described as a mix between "a Shar Pei and Ryan Reynolds."
That isn't the ONLY X-Men related project FOX is working on. They're also attempting to create another Wolverine sequel. While I haven't seen the film, I'm told that it leaves the door WIDE open for such a film.