Yeah, at this point a lot of ROTS is starting to be covered pretty well. Its definitely the movie that seems to get the bulk of the waves. Anyways, I like everyone else's ideas, and going with a 6-figure Build-A-Droid lineup, I have a lot of the usual suspects as well:
Coruscant Gray #41 Clonetrooper
Newly Scaled SA General Grievous
Red Robes Palpatine
V-Wing Pilot
Queen of Alderaan
Padme (Jedi Temple Burning)
I also wouldn't mind seeing some of the others mentioned (the other Palps, Utai Mechanic, new Yoda, 3PO, etc.)