According to Efren Ramirez (Crank, Napoleon Dynamite) Crank directors Mark Neveldine and Brian Taylor are actively in the process of trying to get a third Crank film to the big screen. It was also explained that if Jason Statham doesn't end up returning to reprise his role in the franchise, the directors will move forward without him.
As stupidly unrealistic as these Crank movies are, I still enjoyed watching them. They were just so fast paced and full of adrenaline filled ridiculousness. If a third Crank film actually did end up getting off the ground I'd most likely see it, just to see if that could out match what they have already done.
Neveldine and Taylor are currently working on Ghost Rider: Spirit of Vengeance which surprisingly looks pretty damn awesome. Check out the video below of Ramirez spilling the beans on the new Crank 3 film, and tell us what you think about the possibility of another Crank film.