>>33809660The japanese website still has two sections left. I expect one of them to be about online features, talking about an updated Festival Plaza and probably that building with Ryuki if it is indeed a gym simulator that can be shared with other players, similar to the secret bases in ORAS.
No idea what the other one could be, though. Besides Z-Moves, none of the other sections have said anything about battle features, so it could be for that. Battle Tree + Royal + something else, hopefully something similar to White Forest in BW2.
I personally think the second unrevealed section is just for something lame like a demo or videos.