I also think it's highly like the Genosect movie will include a ton of Gen 6 Pokemon, or at least a couple, the same way Movie 8 included Lucario, Movie 9 included Manaphy/Phione, and Movie 13 included Zorua/Zoroark.
Yeah true, forgot about that.
Anyway, seems like they want to push this Gen out of the way and focus on Gen 6. After all, Gamefreak was apparently one of the first teams with a 3DS SDK.