Here's some info on the next two sets, Champions of the Force, and Bounty Hunters. The work is pretty much done on both sets and although they are due out until next year, here is some info to wet out appitites until then: (
http://theforce.net/collecting/story/The_Future_Of_Star_Wars_Miniatures_95598.asp)
Sounds pretty good :)
I've read a bit of what WotC_Rob over at the dev team for the game had to say. Pretty interesting stuff. Only disappointing thing is they're making two more Vaders. And one is more powerful than Jedi Hunter?! I don't play the game too much, but looking at his stats, he's powerful enough!