Credit goes to NextGenNovelist for this, he has identified a very interesting cutscene that we glossed over at first but makes sense in retrospect.
Mickey, Donald and Goofy alongside Chip and Dale visited Daybreak Town. Most people assumed that their appearance was there because it's a tradition for them to be in every Kingdom Hearts title and that their in-game explanation was that they were projections made by The Book of Prophecies. However, now that we're in a post-Xehanort saga and Mickey is visiting Scala Ad Caelum, there's a possibility that Mickey and friends may have just unintentionally created a time paradox with their KHUX appearance in Daybreak Town.