What brand new features would we like to see introduced in 7th gen?
Sopheria, I'd like to see soaring expanded so that more flying Pokemon are able to be soared on. I'd live to soar on some cute Pokemon such as Lugia, Giratina, and Reshiram. How about soaring on an Aerodactyl? What about Flygon or Salamence?
I also want to see a lot more "episodes", akin to the Delta Episode. The Delta Episode was great and I think a lot more of those will add a lot of value to the game. I guess, these could be sidequests, but they can add a lot to the post-game festivities.
Someone mentioned the ability to ride Pokemon, like Gogoat? I like that. Do that.
I think doubling the amount of PC boxes might be fun too.
How about co-op? Via the internet, or local WiFi, bring another player into your game. It'd be kind of like the Union Room but you and a friend (or more) can explore the area you're currently in with you. They, of course, can't go beyond that, but still.
Time Machine. With Gen 1 being rereleased, I'd like to see some sort of interaction between those games, and current gens. The ability to send Pokemon from Gen 1 to Gen 7 would be interesting. They'd need to work out how to convert/assert a lot of the changes in data though. Good luck GameFreak.
I need to think of more ideas later.