Endor Commandoes, there's 3 I'd like to see... Sergeant in Trenchcoat ala the SS 12" figure, the blonde bearded Trooper to get a resculpt of the under-articulated vested Trooper we've now gotten twice, and the vintage Trooper with the camo coat (opened) would make a nice update to that trooper. One could also argue the POTF2 Trooper with the closed camo coat/hood makes a good candidate as well.
For me, call me crazy but I wouldn't mind seeing Han Solo... Yes, Han Solo.
I don't care for the ball-socket torso on him from the vintage figure, so I'd happily buy an updated figure... He could:
-have retooled legs so his holster fastens to his thigh
-retooled torso so he's not so awkward looking with the giant hole in his back
-use the new Han likeness from the Endor battlepack to get it out a bit more.
Proper blaster would be cool as well.
The torso would be the big fix though, in my view.
Leia's a needed do-over. I could see the Biker Scout getting more articulation if they felt like putting another one out with minor tweaking to get people to buy more of the same.
I'd not mind seeing the IMperial Scanner Tech decoed in black with a generic headsculpt and a Death Star Trooper helmet as well, for the DST's on Endor that are seen running about as well.
I think like Jayson said though, General Lando's a good bet. And Nein Numb Falcon.