GH's Swami is saying:
Tion Meddon (Bruce Spence Alien)
Read Here but be warned of spoilers
My 4 preview figures would be:
1) Gen. Grievous (Droid General)
2) Wookie Warrior (possibly even Chewbacca!)
3) Episode 3 Clone Trooper - just like Episode 2 ...
4) Droid - Obi-Wan Astromech (since fans voted on it) ...
Looks like I picked 3/4! Go me!