Board Thread:General Discussion/@comment-33474311-20180408020520/@comment-4010415-20180408023034

Sadly, unless Disney buys RWBY (which I'm sure won't happen), we won't see a RWBY world in Kingdom Hearts.

The worlds in KH are only based on Disney-owned media and original ideas by Square Enix. I would say "Disney movies", but Square Enix can finally make worlds based on the Pixar films as well. Apparently, Square has been wanting to make a Toy Story world since the very first Kingdom Hearts game, but Pixar refused to let them use any Pixar stuff!