Hey, if you want to believe that Coro Coro are revealing Z at all, knock yourself out. I'd love it to be true, but I just don't see it.
Expecting it is daft, though. It doesn't fit into how the series is generally promoted now- no, a worldwide Pokémon Direct was not an unexpected leap from Nintendo, who had established a precedent for revealing titles that way.
You do realise ORAS was revealed randomly in a trailer posted to Youtube right? No massive Direct or hype, just there. Not even a hint. It just happened.
I think no one knows shit except maybe Joe and he would never even reveal that he knows it so. Meh.
In this case, I'm currently as in the dark as everyone else