Based on
this photo at the SW Collector's Archive, this is the complete list of the original vintage three packs, which Hasbro seems to claim they will be sticking to rather closely. I figure it should give us a good idea of what to expect, especially if Hasbro follows the modus operandi they've used for the Vintage Collection so far (i.e. "the best version of the figure possible"):
Set 1 (Android Set):
-C-3P0
-Chewbacca
-R2-D2
Set 2 (Hero Set):
-Han Solo
-Princess Leia
-Obi-Wan 'Ben' Kenobi
Set 3 (Villain Set):
-Stormtrooper
-Darth Vader
-Death Squad Commander
Set 4 (Villain Set):
-Sand People
-Boba Fett
-Snaggletooth (Red)
Set 5 (Creature Set):
-Hammerhead
-Walrus Man
-Greedo
Set 6 (Hero Set):
-Luke X-Wing Pilot
-Obi-Wan 'Ben' Kenobi
-Han Solo
Set 7 (Droid Set):
-R5-D4
-Death Star Droid
-Power Droid
Set 8 (Rebel Set):
-2-1B
-Leia in Hoth Gear
-Rebel Commander
Set 9 (Imperial Forces):
-Bossk
-IG-88
-Snowtrooper
Set 10 (Imperials):
-Imperial Officer
-Dengar
-AT-AT Driver
Set 11 (Hoth Rebels)
-Han Solo in Hoth Gear
-Rebel Soldier
-FX-7
Set 12 (Bespin Set):
-Han Solo in Bespin Fatigues
-Ugnaught
-Lobot
Set 13 (Imperial Set):
-Zuckuss (4-LOM)
-AT-AT Driver
-TIE Fighter Pilot
Set 14 (Bespin Alliance):
-Bespin Guard
-Lando Calrissian
-Luke Skywalker in Bespin Fatigues
Set 15 (Rebel Set):
-Leia in Hoth Gear
-R2-D2 with Sensorscope
-Luke Skywalker in Hoth Gear
Set 16 (Bespin Set)
-C-3P0 with Removable Limbs
-Ugnaught
-Cloud Car Pilot
There's definitely a lot of room for Hasbro to do some simple repacks here, what with many of these figures already appearing this year in the Vintage Collection lineup, and a few (Bespin Han and Walrus Man) being confirmed for the 2011 Vintage lineup. Outside of some minor upgrades (mainly in the realm of ball-jointed elbows), the only figures that really stick out as needing totally new, from the ground-up versions are Lobot, Hammerhead, Snaggletooth, and the Hoth Rebel Commander. Which, given my pessimistic attitude, means Hasbro will probably not do the packs that those figures are included in.