I just realised the Pokemon show is (probably) more impressive than I first gave it credit for, at least from an animation perspective. Most animated shows love to reuse the shit out of assets. Pokemon is constantly introducing new settings, characters, and 'mons with each episode.
A new Snap was rumoured probably since at least the Wii, though at the time it was (likely) just still rumours, given the remote. Ditto with the WiiU Gamepad. Who knows how long the preliminary discussions were going on at Nintendo.
I'm still surprised at how Nintendo is able to keep these things under wraps. They only announced it in June last year, and now it's being released 10 months later. Paper Mario: Origami King was released even more quickly. If it was Ubisoft, I know they'd probably have all their titles for the next five years leaked out!
Also...if this is supposed to take place in feudal times, it'd be a nice touch if Pokemon species that in lore had declining numbers in the modern day had larger numbers in this. And the reverse for species that proliferated in modern day (I don't remember if Grimer and Muk were in Sinnoh in D/P/P, but if they were, they should be completely non-existent in the feudal era).
Of the three new starters i like the grass types looks the most, but my love of reptiles calls out to the dopey little trashcan on legs that is Fuecoco. Here is to hoping that evolving makes it looks less like it came out of Bubble Bobble