MMA fighter Gina Carano, who recently starred in Stephen Soderbergh's action thriller Haywire, is currently in talks to star in Fast & Furious 6. If cast, she'll join Paul Walker, Vin Diesel, and Dwayne Johnson who are all set to reprise their roles. Justin Lin will be back to direct the movie, and I imagine some of the other cast members will be coming back as well.
As of right now we know nothing about what this next chapter will be about. We do know that it's going to be more of a heist movie this time around, which could be very cool. It was also described as being "their most dangerous adventure yet." Fast 5 was a pretty awesome film, and a perfect transition into where the studio wants to take the franchise.
Carano would end up playing a kickass member of Johnson’s team, who I'm sure will be hunting down Diesel and Walker again. Fast 6 is scheduled for release on May 24th, 2013.