From the Presentation in the Direct, it's very clear we are dealing with Generation 7 here.
And if there is anyone actually still doubting it, there is this part on the official Pokémon site:
Even further, the direct showcased a new, easy to miss (or mistake for Fletchling&co.) glimpse of a woodpecker-inspired Pokemon design:
All that's missing now is a further connection to Zygarde and emphasis on direct connection to Kalos.