I'll say while I don't expect us to see Mario Kart 9 any time this console generation, I'm surprised Nintendo hasn't made a meaty expansion pack to capitalize on Mario Kart 8's evergreen sales. It feels like they could throw out a whole game's worth of new tracks, a few of the missing Mario Kart Tour characters, maybe a single player mission mode of some sorts, some kind of online event features like Smash/Splatoon has, and make a whole lot more money with Mario Kart on consoles without having to commit to a new game. So many of the important ongoing franchises that jumped over from Wii U to Switch have survived as ongoing service games like Splatoon (though Splatoon 2's content updates themselves are no more) and Smash Bros., yet Mario Kart has sort of avoided that entirely, even though it actually did get content updates during the Wii U.