Super Mario Odyssey looks interesting, but I have to admit that all the hidden moons kind of turned me off a bit. I think we've just had far too much "find all the hidden objects" in games like Assassin's Creed.
Octopath Traveler... I don't know what to think about that either. They showed a lot about active skills and how you can use them to manipulate the world, which seems interesting (and maybe more importantly, different), but it does mean that the game will need some well-crafted puzzles or else it will just get boring. I'm not the biggest fan of the art style. It just stands out, and I'm not sure if that's in a good way. Why not just use the nice hand-drawn art style from the SaGa Frontier games?