The Force Unleashed is the next set and will be released in November 2007 despite the associated game being delayed until 2008. About 25% of the set will be characters from the game. It will be a huge set and will contain figures from all 10 factions.

The Hoth Battle Pack will be released at the end of 2007 as a Target exclusive. It will contain various figures to recreate the battle of Hoth including General Veers Hologram and Blizzard Scout One unique AT-ST. It will contain a new Hoth map that will link up to the Hoth plains map from the AT-AT set.

2008 will have 4 sets.

If A&E needs to be reprinted, it will be on standard circle bases.

The number of VRs per set is expected to go back to the typical 12 from the 14 in A&E.

Jedi and huges will be more aggressively priced in the future to make them more competetive.

The 2007 starter has Throne Room on the other side of the Korriban map.

Korriban may recieve different starting positions if it becomes DCI legal.

The following new characters were mentioned:

Hologram Veers (in Hoth pack)
Blizzard Scout One (unique AT-ST with super rapport for AT-ST making it cost 10 less. In Hoth pack)
Darth Revan (Sith version from before KOTOR game events)
Luke with Yoda in Backpack (in Force Unleashed)
Nomi Sunrider
Darth Talon
Cade Skywalker
Mouse Droid (Hinted to have ability similar to DDM Relay Orders and be Fringe)
Gotal Mercenary
Rebel Troop Carrier
Hoth Turret (Immobile, but can be placed outside the normal start area)
Luke Skywalker (More powerful than any previous version)
501st Trooper
Jar Jar Binks

Thanks to Monni316, JEDIRAGE, ironlightsaber and LoboStele for sharing their experiences from Celebration on the WotC boards in various threads.

(Many of the comments above come from people's memory, have no independant verification and so might not be 100% accurate.)