Found this on the net about the storyline.

The hero of DragonBall, Son Goku, will be played by up and coming actor Justin Chatiwn. He recently starred in Steven Spielberg�s War of the Worlds as well as The Invisible. According to the character descriptions, Goku is considered uncool and unpopular at school, but he is in fact an extremely talented martial arts fighter who gets rigorous training from his grandfather, Gohan.

The role of Goku�s school friend Teto is being played by Mexican actor Luis Arrieta. A relatively minor role, but important because he is rumored to be a replacement for Krillin who has not yet been mentioned in anything relating to the movie. Teto is picked on by Carey Fuller and Aguandas until Goku steps in and helps his friend.

the real trailer - > http://www.angelfire.com/liveactiondragonb...ie/trailer.html

looks like fan made was better

i dun think this is like dragonball

piccolo white,and he looks like the villian
mai is who??i thought the dautgher of vegeta??
since when bulma be so brave?

and the character i know so far was
goku
bulma
piccolo
mai
yamcha
master roshi
chi-chi(not sure)

they should make vegeta,gohan or something
villian sholud be cell or frieza

i think they creating a new story of dbz,not following the original