I do think that a straightforward Z as we'd understand it from the past is getting less and less likely for every day it goes unannounced.
I dunno what we'd be getting instead, mind, but this schedule didn't make any sense to me if the plan is just to release a bog-standard third version.
Considering "Bond Evolution" (that's what I'm calling it right now...whatever Ash-Greninja is) is a thing, a simple Z is not likely.