Saw this over on DreamCancel's forums, apparently the update is available (i think only in Japan, as my version isn't giving me an update yet) for KOF-i, which adds the Yagami and Elisabeth Teams as well as a new stage.
I'm reading that this stage is based on Takuma's stage from the first Art of Fighting game, and note the cameo appearance from Shiki in the background.
Speculation on forums at the moment is that the last two DLC characters will be EX Kyo and Mr.Karate, though personally i would still like to see EX Raiden with four dropkicks. :(
[Edit]: The KOF-i Facebook page has just updated with these bits of information: