Its been so long since there's been a new "main-line" pokemon game, what incentive would there be to buy the next pokemon game if its just a "Z" version with no new pokemon? Even if a new game was announced tomorrow it would be another 6 months at a minimum until the game was release. With that said, If they make a "Z" version I hope there are at least a handful of new pokemon since X and Y were so scarce in that department.