Sources tell me that Shadow Hearts: A New Age might not be a good idea for an RPG world. Therefore, the idea was scraped and in the trash can.
In any case, to replace it, a Kingdom Hearts RPG is in the early stages of development! Until everything is all set up, you will have to settle for a picture of The Keyblade Graveyard with a few extras.

For Worlds, here are some that are defineitely going to make the cut:
Twilight Town
Hollow Bastion/ Radiant Garden
Destiny Islands
Halloween Town
Neverland

Summons are under discussion as well as a new enemy... More will be explained later. In any case, I hope it turns out well! ^_^