After Blues came out, it seemed uncertain what Kotobukiya would tackle next, if anything at all. But the Winter 2011 Wonder Festival has an unexpected answer. Kotobukiya's next model kit foray will be Zero. And that is, specifically, Zero of the Mega Man Zero variety.
Price and release date info will be forthcoming (a general release frame is available, but it's covered in this picture sadly. Update: The kit is planned to release this summer.