I doubt you'll see a KoTOR 3 aside from this MMO. 360's KoTOR is call Mass Effect and is a trilogy.
I have to hand it to Bioware. Full voice for a MMO is a huge leap of faith because the costs involved must be staggering and that's on top of the already enormous costs of developing a first rate MMO.
It's a good thing Bioware is now part of EA because if this failed it probably would've taken Bioware down with it otherwise. I have the upmost faith in Bioware's abilities but this is damn ambitious and risky route they've taken. Good for them. Hope it's a huge success.