I hope you're right, but they've never done more than one Mario Kart or more than one Smash on a system before. I wouldn't hold my breath.
I think the number of Smash fans who missed out on Smash 4 is much smaller than the number of Mario Kart fans who missed out on MK8.
MK8 and Smash 4 would be ports so this would still hold true even with a Mario Kart 9 and Smash 5 on Switch.
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