GOD OF WAR, i think GOW outsells Zelda on the switch.
Seeing Zelda being at almost 5 million physical and still having the whole month of december.. that's really unlikely.
Maybe if they bundle the shnitzel out of GoW which will probably happen.
I think GoW will take it during the first month but after the holidays Labo will win for sure. They will probably ad more versions of it on top of that so..