Ok here are some direct quotes from wikipedia and I don't claim them.Here they are:
is an upcoming action role-playing game developed and published by Square Enix for the PlayStation Portable. It is an installment in the best-selling Kingdom Hearts series that focuses on Terra, Ven, and Aqua, characters briefly featured in Kingdom Hearts II Final Mix. Many previously unexplained elements from the original Kingdom Hearts trilogy are present. The game was announced at the 2007 Tokyo Game Show. Currently the title is only confirmed for a Japanese release, though Square has plans for releases in other territories.
[/i]The game is believed to have a gameplay similar to the style of the previous games in the series,particularly to Kingdom Hearts Re:Chain of Memories in that card decks will be used. The game will be divided into three scenarios, with each scenario having different styles of gameplay based on the personalities and abilities of the three main characters; Terra, Aqua and Ven. Game director Tetsuya Nomura has mentioned players can play from any of the three scenarios and possibly stop mid-way through one scenario to begin another. The developers plan to add multiplayer components and a new character growth system
[i]Birth by Sleep is a prequel to the Kingdom Hearts series, taking place ten years before the events of the original game and focusing on the story of Keyblade masters before the series' main protagonist Sora. Nomura has stated though there are three scenarios, there is not one singularly important scenario or character, but the main theme is Ven's identity. The story was speculated early on to be connected to the unlockable trailers at the end of Kingdom Hearts II and Kingdom Hearts II Final Mix. Nomura has since confirmed a connection to the trailers. The story revolves around three Keyblade apprentices in search of a missing Keyblade master, Master Xehanort, and his apprentice.Their disappearance foreshadows a great disaster. The game will take place in various Disney-themed worlds, both new and old, and will reflect the time difference between this game and the previous Kingdom Hearts games; for example, a young Hercules in the Coliseum.
and here is the full link if you want to see for yourself, and I hope this helped you all [url=http://en.wikipedia.org/wiki/Birth_by_Sleep]
most likely going to be on the PS3 because the just of the games have stuck with sony, but since nintendo got CoM maybe it might be for the wii too, I personally think that would be sick to be able to swing the keyblade around with the wii mote, like in Twilight Princess
