All right, before you go diss me and say 358/2 Days and re:coded are spin-offs, let me explain: Nomura stated a long time ago (before he said recently they were spin-offs) that the mobile KH titles (except KH3D, which really is a main title) are NOT spin-offs. They are really main titles because they explain parts of the KH story you don't understand. That's why Square Enix knew this and decided to make the HD Remix games. So with that said, a spin-off should be something that can branch out from the original and make a standalone story without having to rely on the original's story. So, dig some KH spin-off titles? Me, if they were to make a spin-off, they could probably expand on some of the Disney worlds. . Hahaha... I can imagine: Kingdom Hearts: Hercules' Journey. They can even explain about Cloud, Sephiroth, Tifa and the other FF characters involvement also.