That's cool guys, well it would probably be a more mature version.. Maybe if Square Soft put out two versions, lol.. One can only dream.. And if the heartless were to come back, the world would only make subtle changes in things such as the dialogue of characters music and sky and such until the zone was then cleared again.. And if not cleared, that zone would become dark again and cause a respreading of the darkness..
These are just ideas open to theory though.. I don't see why we couldn't discuss possibilities, after all forums are for discussions..