I think Kevin Smith should make this movie, Goku and his friends would only hang out infront of drugstores and talk about women and movies, then when the bad guys arrive they go of camera, you hear a bunch of fighting sounds, then they come back, dust off and ceep talking.
Best move ever.
Oh and sorry to say but the part of Goku is taken, yeah I´m not happy eather but it wasn´t my choice :)