^ Yeah all of that, basically. It would be great if they were new, unrelated characters to the main cast, but it seems unlikely. The visual similarities that we can already see in their clothing and colors hint at it too. Who knows what kind of a connection it's going to be, but it does seem the most "KH" thing to happen to have some kind of connection. It's how it's been so far, all the new characters in the previous games have ended up being closely tied to the main cast.