As big as Smash is, I'm sure the addition of the Lite will offset smash increase, then there's also a mainline pokemon and RFA that's going to push hardware for the rest of the year. I'd be very surprised if Switch is not up YoY compared to last year. I'd give launchweek (next week) to last year, but expecting every other week to be up the rest of the year.
I think it's very optimistic to think both week 50 and 51 will be above 300k and week 52 around 200K.
But i'm excited to find out! It would be huge if you are right.