I'd personally like to see
I) General Grievous in Technic
II) General Grievous' Starfighter would be nice, but I'm not sure it's popular enough to be made a set (it's only in the movie for like, two minutes)
III) Anakin's custom Clone Wars starfighter
IV) A Jedi council set, with all members
V) Anything relatively unexpensive with Plo Koon in it (preferably his starfighter)
VI) More of the ROTS jedi without lightup lightsabers
VII) Like SuvieD said, a custom jedi kit, but with more regular accesories. In other words, no yellow, clear, orange and light blue lightsaber blades because they are not ever even glimpsed or mentioned in the movies, and everyone knows the games aren't accurate.