Kingdom Hearts 3 to be shown at TGS

At the recent Square Enix Event, a teaser trailer was shown that basically said they would make a big announcement dealing with the Kingdom Hearts series, at the Tokyo Game Show in September.  A teaser for an announcement. That is totally Square Enix. So what do you think will be announced? Kingdom Hearts spin-off for Portables (Birth by Sleep)? Or Kingdom Hearts 3 (For Ps3, Wii, or 360?).

Speculation starts here!