An interview with Kingdom Hearts director Tetsuya Nomura, a new entry in the series will be announced at E3 2010.
Speaking in the latest edition of GameInformer (via NeoGAF), Nomura confirmed that one of the two projects he's been involved with will be revealed this month in Los Angeles.
It's strongly suggested that the new game will not be on HD consoles, Wii or the iPhone - pointing strongly at the DS, PSP or even Nintendo's latest offspring, the 3DS.