I haven't bought a Switch yet due to my financial situation, but I'm really excited for all those games - especially Smash. There's something to be said for a game where Mario and Sonic can beat up Cloud and Snake! I'm 100 % sure that Smash and Pokémon are going to boost the Switch sales to high heaven.
But the game I really still want to try is Mario Odyssey, as I have already played Breath of the Wild on Wii U. I know I'm late to that party, but better late than never.