LOTR was a film about a load of guys going for a walk. for 3 hours. dude, even nature shows are more epic. The longer they'd of strung that out the worse it would have been.
Dragonball was epic as it was, there was no need for a live action, least of all an american live action when all they wanted to do is milk a big selling series rather than make something the true fans would enjoy.
Says it all..