The dancing game is funnier when you take into account that Sega (the people that own the Miku games) bought Atlus a while back.
EDIT: Though, if Mark doesn't show up in it, I'm going to be severely disappointed.
EDITEDIT: Or Funky Student. Though, something just occurred to me: the dancing game uses the same engine as Catherine, right? And it'll be the same engine Persona 5 uses? What if the dancing game started off as a joke project/warmup project for Persona 5 and they decided "hell, let's see who'll buy it"? I mean, it's not the first time it's happened: several Double Fine games were originally game production exercises.