Nah, it's fine. The world is an amalgam patch-work of multiple worlds. What one small piece brings does not mean everything else follows, I frequently forget that. We are getting bloated though. We already have enough characters running around (which the QM may not be tracking?). One of the more important ones we have yet to even see is Pope Frollo. Not even a rumor about him or the Mirror Kingdoms. If omake writers can just pick and choose from the modern disney franchises though, or add more characters (like some have done).... Ah, it's a needless concern I guess.