Seihyouken on 25 December 2009
Nomura already confirmed that Birth By Sleep will have a teaser for the next major Kingdom Hearts game, but that doesn't necessarily mean that the next game will be Kingdom Hearts III or even that it will be announced any time soon.
Kingdom Hearts II came in 2005 with a teaser for Birth By Sleep and everybody assumed that it was Kingdom Hearts III for years until the game was finally officially announced in 2007 at TGS for PSP.
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