The official Pokémon movie blog has updated. Translations of the new entry follows:
Appear! Movie Details #7: Concept Art for "Arkhē Valley and its Residents" Appear!
Arkhē ValleyThe Inhabitants of Arkhē Valley
This is Arkhē Valley, where Barza and Mary grew up together with Hoopa!
It's a village rich in greenery that has a very different atmosphere from the desert metropolis Désser City
Source:
http://www.pokemon-movie.jp/pokemovie_ch/?p=627