I doubt Mario Kart 8 Deluxe sells under Zelda or Mario Odyssey. It'll sell higher, and it won't even be close. Historical data shows the same trend every generation from the SNES. MK8 will have incredible longevity; while Zelda and Mario sales will die off to almost nothing in 12-18 months, Mario Kart will sell hundreds of thousands to millions annually over the next 5 years. Being one of the most popular family aimed franchises, it will see huge during holiday seasons. Years down the road, in the final days of the consoles life, it'll be one of the top selling Switch games when everything else is forgotten.
At least this revision of the Switch, we might see Nintendo turn towards a more iterative approach with hardware, rather than generational.
I describe myself as a little dose of toxic masculinity.