WHAT?
This really screws me up.
Well, I can understand them saying no right now, there would be a lot of things to do to create a compiled third version. Off the top, I'd point out Black City and White Forest, as that's quite a bit to try and squeeze together logically in a third version.
Once the quirks are worked out from these two, I'm sure they'll introduce a new version to aid with battling premises as they did with Emerald and Platinum. 'Specially with all this triple ridiculous battles.