A lot of people missed the small fact that in late August/early September Junichi Masuda visited France for a few days. While the visit itself wouldnt be anything special when asked about the reason for it Masuda replied "STUDY". Study what?
https://twitter.com/Junichi_Masuda/status/637532967410098177And whats even more interesting ALL of the places Masuda visited are in SOUTHERN FRANCE:
Fontaine-de-Vaucluse
Aigues-Mortes
Camargue
Arles
Mayrueis
Yes you know what that means: yes Southern Kalos in the next game
And its not a surprise why there is no annoucement yet. GF obviously still works on the game. Of course Masuda's visit dont they're getting started. He was there most like to get more pictures and knowledge for extra details etc. They're probably done with the story (hence why Zygarde was revealed already) and they're still are perfecting new places (thats my wild guess obviously). Seeing how Zygarde was revealed already they most likely want to create huge hype for the next year game since its the 20 annivesary game and we'll probably hear about it early next year.
Links to Masuda's pictures from southern France
https://twitter.com/Junichi_Masuda/status/639176248112058368https://twitter.com/Junichi_Masuda/status/638247970534649856https://twitter.com/Junichi_Masuda/status/638306298711314432https://twitter.com/Junichi_Masuda/status/638682782533840897https://twitter.com/Junichi_Masuda/status/638760395088375809https://twitter.com/Junichi_Masuda/status/638990205781848064