This, more legendaries (we only got like 3 new ones this gen, there are those unreleased ugly lookin' ones for them to release though), and the Lati@s mega stone
More items would be nice too, berries and gems that we currently can't get
A use for that random train station in Couriway Town to travel to Hoenn, then Sinnoh, then Kanto, then Johto, then Unova, with an all new story line for each region, maybe having the regions be a little more developed like time passed, kinda like from black and white to black and white 2 ^_^ ERMAHGERD all of this is confirmed now.
Or just a ruby and sapphire remake instead would be good. Thanks game freak you now know what to do for your next projects!