I know that we’re all looking forward to Sonic Mania and some folks have already preordered the collectors editions. However it seems like the Switch version is currently not avalible at the moment. Your best bet is to preorder it on Game Stop’s website. Is this a sign with things to come with the Nintendo Switch later down the road? Only time will tell
GameStop link : http://www.gamestop.com/games/sonic-mania-collectors-edition-nintendo-switch/141939