It is your world, on that isn't exactly known in the KH universe due to reasons, so its lore and land are yours to decide I believe.

So roll with it Xikari if that is what you truly desire!

Edit - Late post is late.

L, it's your way of going about it all, depending on what you know about the place since it is a pre-existing realm. Just follow your heart and i'm sure it will turn out fine!