So... *cough* I have a theory about the "creepy stage 4 boss." Remember how people were confused about Yuki's name meaning snow, despite using fire attacks? Well, if you didn't already know, it was a reference to a (probably) Buddhist hell where the wind is so cold that your skin cracks and bleeds. Fun stuff, I know.
Considering the fact that Stage 4 will be a snow stage, I'm wondering if ZUN will draw from his PC-98 routes and have a spiritual successor to Yuki. As in, some hell monster in the vein of Clownpiece that can make really cold wind or something.
Just please, no more lasers.