I'd like either the simplistic style of the Batman/Batman Beyond/Superman/JLA series of cartoons, or the "pseudo-anime" of the new MOTU cartoon, or even of the Transformers: The Movie. It has to be a class act all around, period. None of this "sometimes good, more often lousy" animation that was so prevalent in the 80s.
And good voice talent is a must as well. Original actors wherever possible (though I understand big names like Lee, Portman, and MacGregor may be unavailable or unwilling).
Since Dark Horse is also exploring the Clone Wars (primarily from Anakin's standpoint, IIRC), and at least two novels are planned (one with Obi-Wan and the Ol' Grinner himself, the other with Mace), the animated series should try to mesh with these, but focus on a different cast. Adi Gallia, Plo Koon, Ki-Adi Mundi, or another fan favorite Jedi would be an obvious choice.
And, like the short-lived holonetnews.com, give us all sorts of stuff we want and clear up long-debated questions.