Don't forget we could also get a Nick Nack from the James Bond line with that body. It will have many purposes that is for sure. I suppose the Ewoks, Jawas, and other little creatures as well as Ep1 Anakin and other kids would use the same body. It is deffinately worth the effort.
I would like some more themed bases like Vader's. It adds just a bit more realism to the figures since I never saw any character stand on a "Star Wars" base in the movie. I'd like some more grass/mud bases - those are great. I got my Vlad using one since he never came with a base (originally had my Pt.3 Jason on it). Snow/Ice for Hoth, ships, more sand bases, etc, etc. The Emperor's throne is a given after Jabba got his.
I could see bases being exclusives for more background characters such as Cantina Aliens and Jabba folks. I'd love for them to interconnect for a diorama.
I think we could see ONE announcement before Toy Fair, but nothing big. Perhaps Illum Padme? ANH figures have to be planned for this year though. It would be a huge missed opportunity since we have so many prequal and RotJ figures (even Han can be RotJ).