You are forgetting, of course, that being a movie, we would need to compress things anyway, which would likely mean Piccolo-style action and drama (quite possibly the only thing DBE got right... in theory, at least).
As has been said, it'd be easy enough to merge the three main villains of pre-Z--Pilaf, the Red Ribbon Army and Piccolo. Have the RRA be the main antagonists, with Piccolo being the big bad pulling the strings, and Pilaf being a side-villain of incompetence, much as in the manga.
I'd think it would be hard to get Tenshinhan properly developed if we want to focus on earlier characters like Yamcha, Krillin, etc. And the way the characters' roles develop through the series, that might need to be the case.
(Not that I didn't try to shove it all in there in my notes. And that is why I am not making movies, and the people behind Spidey3 and X3 ... are? ... They're still making movies, right?)
... wait, why did Fox renew their DB license, again?
... Wait, why am I not dropping screenplays in coffeeshops frequented by Fox execs like Brian Griffen? That worked out real well for him!




