In addition to my other suggestions, (seen in another thread in this dear hasbro section) for ROTS, how about these:
Commander Gree. Why? Because he was a very cool clone character and my favorite clone. Much more so than Cody
Cody: I can't believe all the clones and minor characters they made and bypassed Cody. He's one of the 10 most major characters in ROTS I'd say.
Bly: A member of his squad will be made but not the man himself? Blasphemy.
Boss Nass: Since Nass had more screen time than some of the characters who got figures I say give him a coll. 2 figure with moy-moy articulation.
Tion Medon's Sidekicks: They were behind him on the landing platform
Palpatine: I think I mentioned this but the oufit seen on the 12'' that he fought Yoda in is a must.
Lucas: Since Jorg Sacul was so limited how about the blue, Lucas background character for wide scale release?
Nemoidian Pilot: The guys who run around the Hand before it blows. Different from the Warrior figure (whose seen on Mustafar)
Grey clones: Remeber the scene were the clones turned on KaadiMundi? They were like Artic Troopers. I really want these.
Blue Order 66 Clones: The ones Zett Jucassa killed
that's all for now!