I would love it to be high/classic fantasy.. probably forgotten realms..
and I would love for it to be adult oriented..by which I don't mean full of boobies..but something aimed at entertaining adults, not just 6-10 year-olds.
because I'm an adult.
more characters than just the token party..more villains than just the badass one with the cackling laugh.. something with a bit more body to it than your average episode-based cartoon.

also, I would have the people from Avatar (the cartoon) make it..to see if they can pull it off.