SciFi Squad has just received this exclusive clip from Dragonball: Evolution in honor of the film arriving on DVD this week.Dragonball: Evolution, of course, is based on the popular manga series. Starring Justin Chatwin as Goku, the film follows Goku, Earth's greatest champion, as he defends the planet against an invading race of alien warriors hell-bent on dominating the universe. James Wong directs from his own script, with Stephen Chow (Kung Fu Hustle) producing. James Marsters (Buffy the Vampire Slayer) co-stars as the film's villain, Piccolo, while Jamie Chung plays Chi Chi and Emmy Rossum takes on Bulma. The legendary Chow Yun-Fat rounds out the cast as Master Roshi, Goku's mentor in the film.