I think instead of a new 3D Mario right away we'll get a port of Wonder, especially if it's not backwards compatible. If that's the case, that BotW demo they supposedly showed off at Gamescom may be a hint at a BotW port, though why they would port BotW instead of TotK at this point would be beyond me, especially when BotW was a launch title for their previous console. A different Zelda remake may be a good bet, like an HD/4K version of one of the N64 Zeldas. I still think the new F-Zero may be saved as a launch title for the new console to show off the new hardware. Either way, they need a solid, brand new entry in one of their big franchises or something new and original (a "killer app") to promote immediate adoption, especially if they're apparently releasing so many good games to sunset their previous console. They can't make the same mistakes in the launch lineup that they did with consoles like the GameCube and Wii U.