I also recall someone making a prediction that Breath of the Wild will surpass Super Mario Odyssey in sales.
At 14.52 million it has closed the gap from 2.2 million in January down to 840K. It's also fair to note that while Super Smash Bros passed Zelda in its first quarter, in 2019 it didn't do a lot to widen the gap as Smash sales are slowing down while Zelda sales are actually accelerating year over year.
Breath of the Wild will be the Switch's #2 game next year unless Pokemon sales do something insane.
I describe myself as a little dose of toxic masculinity.