I was really surprised they decided to use Kalos for the next Legends game. I was sure it'd be Johto. I'm not sure what to think about it; Legends Arceus felt like The Pokemon Company was finally realizing that wild pokemon should be... wild. This new game looks like it's much more modern, though - how can they capture that same feeling of expedition and exploration in a developed landscape?
Edit: Apparently it's set entirely within Lumiose City. I'm pretty convinced now that it's going to have nothing in common with the previous Legends game, which is a real shame. All that game needed was a bit more attention - that a sequel would've allowed for - and it would have been the best representation of pokemon ever.
There's a reason all the kids in the late-90's ran around their respective playgrounds pretending that ferocious wild pokemon were attacking them; that's what everyone imagined future games would be like. But that was back when the games were only held back by the gameboy hardware, rather than The Pokemon Company's current unwillingness to give games the developmental resources they need.