I have a feeling that they're hinting on a Pokemon SV DLC that gives you access to Kalos.
I mean, Spain and France (Pardea and Kalos) border one other, there's a little walled off area at the north-east of Pardea that seems to just cut through roads even, the way Terastals work are pretty similar to mega evolutions (types might or might not change, no time limit during battle, makes a Pokemon only a bit more powerful etc), there A LOT of gen 6 Pokemon in Pokemon SV, I didn't count, but I'd saw perhaps the most out of all previous gen ones maybe, and the anime special 2 days ago used a lot of Pokemon XY background music.