Bro bangdoll @ ML pointed out, that the Geara Doga, the Geara Zulu and the Rozen Zulu share much of the inner frame. And since the Rozen IS pretty popular...we'll see
Same thing could point to the Providence as well...

My first 4 month preorder with just some clear-red lineart as reference

Looking at the design of the panel-lines, which is very similar to the Nu, it's def. possible Bandai will incorporate the psycho-frame theme into the Sazabi as well. At least there will be something to shine under black-light in a dio with the Nu.
However, if those long vent-looking bits on the skirt armor, the feet etc. are indeed such a clear-plastic-bits, I guess there won't be a gimmick to hide them.