This news is a couple of days old, but the GreenDragon posted a possible listing of some upcoming figure waves for 2005. Included are:
FOTR Wave 5 (May/June 2005):
Weather Top Strider, Talking Flaming Ringwraith, Boromir with Sound, Council Legolas, Dark Galadriel
TTT Wave 5 (May/June 2005):
Aged King Theoden, Battle Cry Uruk-Hai, Sword Attack Aragorn, Talking Balrog-Battle Gandalf
ROTK Wave 5 (May/June 2005):
Legolas, Eye of Sauron, Gothmog, Mount Doom Frodo, Mount Doom Sam