From this link:
http://jediinsider.com/index.php?catid=8&itemid=11005

Four all-new sculpts are planned for later this Fall. We are going to be revealing all of them (and possibly more) at Comic Con, but we'll give you a little taste of our September wave: General Grievous/Grievous Starfighter, and TIE Pilot/TIE Bomber.

See link above for the four photos.