Bold Prediction: Switch Will Sell 4mil Units by Years End in Japan!

[PAOerfulone]

It's certainly possible. It'll need more factors besides the games going for it though.
Splatoon and Mario, I'm sure will do gangbusters, ESPECIALLY Splatoon.
As a new IP, it's difficult to tell how well Arms is going to do by itself, let alone as a system seller if it is one. There have been a lot of Splatoon vibes coming from that game, so maybe it can, we'll have to wait and see.
Zelda... I'm not too sure about that.