A Pokemon Snap game would be pretty nice, though I haven't really played much of the n64 version when I was a kid, haha. But yeah, I hope that they'll either remake it, make it available for different ports, or at least make a new one that has all of the pokemon up to date, or at least, some of the more recent pokemon~!
But yeah, what I'd like to see most of all is another pokemon game that's more heavy on storyline like Pokemon XD/Colosseum! Well, not to say that they can't make one for the 3DS too, but generally speaking it'd be nice to see a pokemon game like those on the Wii U, since I'm a person who does appreciate storylines within video games and I did really enjoy the dark genre from the Pokemon XD/Colosseum games especially! Another soft spot that I had with those games was that they really did a great job with the scenery during battles:
Which they do improve on with the 3DS games but, with more 'power' with the Wii U version, they can really make the pokemon games, or at least spin offs of them really beautiful and appealing to play on! Perhaps they can also make like a Pokemon Revolution 2, or maybe a Pokemon Stadium 3 which I'm still hoping for haha, but I hear that they don't have much ideas for that, which hopefully they'll come up with something new soon~!