I don't quite consider myself to be a leaker that much, but here's stuff for the future since the next games will be pretty big compared to U/SM.

Don't be surprised if some of these turn out to be fake, since I've got this source from a good friend of mine who happens to work in the Europe TPCI, since he had to put it in to avoid danger.

>Set somewhere in Southern/Eastern parts of Europe, mixture of tropical and cold in one spot.
>Huge postgame with an existing region that has a completely new dex with "old" new mons in
>Expected to have a large amount of pokemon for the new region, below Unova's dex .
>Gyms brought back, trials are out until postgame for a big journey for a big reward.
>Ultra Beasts brought back, but Legendaries aren't brought back for unknown reasons.
>Ultra Beasts are given a much bigger purpose and the main role and pokemon of the villain team.
>Story is around on the themes of game rules, and will have the villain team disobeying rules with UBs to win.
>Naming will go back to a much simpler name

I remember that he did mention that there was a new pokemon during in our talks and did a very rough appearance of it.
It did look like some sort an dragon with wings and two legs but no arms, he also mentioned that it had very reddish colour scheme with yellow, white and black colouring in it. I've forgotten the name of it, but it had an Dragon typing with Electric typing. If you want, I can try drawing it from what I remember of the rough sketch, don't expect it to be fancy though.

I can also answer some questions if you want, since I haven't quite covered it all yet. Just remember that I'm slow to respond. I won't reveal any starters though along with main UBs, since that's for the next year.