Until we get more info, I'm posting this as a reference so hopefully a mod will sticky it.

Overview: Justice League Unlimited is a Target exclusive at retail. The line will release to non-Target stores outside the US in the spring of 2009.
Wave 1 (released around August 2008)SinglesSuperman (recovery suit with kryptonite)
Kilowog (with lantern)
Batman (classic costume with batarang)
Hawkman (with mace)
Stargirl (with cosmic staff)
Three PacksGalatea/Superman/Huntress (second costume)
Captain Atom/Green Lantern/Supergirl
Six PacksSecret Society (Grodd, Joker/Red Hood, Green Suit Luthor, Superman, Flash, Batman)
Attack From Apokolips (Superman, Mr. Miracle, Forager, Darkseid, Mantis, Lashina)
Wave 2 (released around October 2008)SinglesBatman (show accurate with Wonder Pig)
Superman (with phantom zone projector)
Wonder Woman
Bizzaro (show accurate)
Sinestro (Sinestro Corps uniform)
Three PacksFire/Ice/Green Lantern
The Question/Flash/Wonder Woman (with lasso)
Six PacksUnknown Name (Batman, The Key, KGBeast, Atomic Skull, Shadow Thief, Silver Banshee)
Legends of the League (Superman, B'wana Beast, Deadman, Commander Steel, Vibe, Crimson Fox)
Wave 3 (released around February 2009)SinglesBooster Gold (show accurate)
Dr. Fate (show accurate)
Superwoman
Parasite
Green Lantern John Stewart (standard GL uniform)
Three PacksFuture Bruce Wayne/Batman Beyond/Warhawk
The Shade/Prison Jumpsuit Lex Luthor/Cheetah
Six PacksUnknown Name (Psycho Pirate, Dr. Polaris, Gentleman Ghost, Tala, Devil Ray, green suit Lex Luthor)
Unknown Name (unknown characters)
Wave 4 (released around May 2009)SinglesUltraman
Red Tornado (show accurate)
Zatanna (show accurate)
Volcana
Batman (with Wonder Pig)
Three PacksUnknown
Unknown
Six PacksUnknown Name (unknown characters)
Unknown Name (unknown characters)
Wave Unknown (release date unknown, sometime in 2009)Plastic Man
Firestorm
Elongated Man (JLA costume)
MattyCollector.com Exclusive 4-packs(note: all figures in each pack will come individually carded)
Gotham Criminals (TNBA Scarecrow, JLU Clock King, TNBA Bane, JLU Harley Quinn) - 1st Quarter 2009
Captain Marvel (Shazam, ???, ???, ???) - 2nd Quarter 2009
Legion of Superheroes (???, ???, ???, ???) - 3rd Quarter 2009
MattyCollector.com Exclusive 2-packsGiganta 2-pack (8" and 4" versions) - still available as of 08/08/2008
http://www.mattycollector.com/DRHM/servlet/ControllerServlet?Action=DisplayProductDetailsPage&SiteID=matty&Locale=en_US&Env=BASE&productID=105864300I'll be updating this regularly as information comes in.
Peace,
Chip
Marrillion is this information official? or are your hipotesis? are you sure that the third wave is going to be released until FEBRUARY 2009???????