In a new interview featured in Kingdom Hearts 3D Ultimania guide book Nomura revealed that they’ve started making a variety of movements for the new title(s) in the series. He also stated that an announcement regarding the project(s) will be made ”pretty soon”.
Don’t expect the next Kingdom Hearts title to be a Final Mix of the recently released KH3D for the Nintendo 3DS. Nomura confirmed that he has no present plans for either a Birth By Sleep 2 or a “Final Mix” version of KH3D.
Other possible candidates for future Kingdom Hearts titles could either be a Kingdom Hearts HD Collection or Kingdom Hearts 3.