Over the past couple weeks, we’ve finally learned a bit more about the next entry in Square Enix’s Kingdom Hearts series. In an extended Kingdom Hearts 4 trailer revealed during D23, Disney’s annual fan event, we were given a first look at Coco’s Land of The Dead, and its narrative implications already have us speculating as to what worlds could come next.  But while pondering what worlds could realistically be in Kingdom Hearts 4 is fun, you know what’s even…