So did PVP and that's absolutely hilarious. Nomura is so hot on making everything canon, and he's constantly telling the fanbase to figure things out, but when the fans do that people get mad.
It's only plot hole, y u heff 2 b mad
Also that there are canon concert scenes and that if Sora ever did appear in Smash, it would likely be canon and explained away somehow. And that in KHUX even the medal mechanics are canon