Meh...
Now I'll be the first to admit I'm not a fan of DBZ, but this was just boring. I mean, it could be interesting if Goku was fighting someone. But here, all tou have is Goku going super-saiyan and shooting a beam of energy. *YAWN*.
Essentially all you did was add a backround and some effects, while using a sprite. On the plus side the effects are well done especially the beam at the end. Try to tell a story in your next movie and not some pointless fight.