Fall regionals are in October? Oh man, you're right, it would be a bad deal for them to make it on BW2 carts merely a weeks after release. Maybe they'll provide the option?
Given this information though, it's really hurting the plausibility of this as a possible VGC 13 metagame. I just hope they don't repeat 2012 with move tutor moves... that would be pretty lacklustre.
Regardless, I have been playing with this stuff and it's good fun :)