It seems you meet Shizui at various points throughout the game. In the first frame, there appears to be a new area or town that might act like a resort of sorts. Can I just mention how beautiful the water looks like? And what is that on the right? It looks like a bangka (some Filipino word for boat) or something.
The middle one appears to show Shizui coming from the boat. There's also a cave immediately to the left, meaning we either came from the cave, or Shizui took us to that cave. It's also interesting that the last two frames has the rival go around with you. In the trailer, he was going with you somewhere as well. I bet he has more of a role than just a rival. Probably a sticky rap*** but I dunno.
I do hope Gym Leaders have MUCH MORE interactions than before, and not just:
"Oh my god [player], how are you? Me? I'm just wandering around Unova doing what I do best. Well, see you around! I'm totally not an Easter egg!"
Pretty much my usual reaction to everything we're getting now.