From the announcement:
Fantasy Flight Games is proud to announce three new figure packs for Imperial Assault:
BT-1 and 0-0-0 Villain Pack
Jawa Scavenger Villain Pack
Hera Syndulla and C1-10P Ally Pack
Within these three expansions, you’ll find some very different figures, but each one helps to enhance the droids of its faction. You may fight for the Galactic Empire with the sadistic protocol droid 0-0-0 and his explosive astromech companion, BT-1. In the furthest reaches of the Outer Rim, you may choose to support your fellow Mercenaries with a Jawa Scavenger. Or, you may kindle the fire of hope and rebellion with Hera Syndulla and her astromech droid, C1-10P—better known as “Chopper.”