Nintendo is going to try to break the year one record for sure.
I believe Nintendo Switch can break the year 1 record. The switch is going to sell out for a few more month and if stock ever build up, Nintendo will hit the market with bundles. Switch will be difficult to get for the rest of the year.
http://bgr.com/2017/04/12/nintendo-switch-mario-kart-8-deluxe-bundle/
This Christmas will be all about the Nintendo Switch with a Mario Kart 8 bundle or Zelda: Breath of the wild Bundle and the release of Super Mario Odyssey.
I predict over 15 million in year 1.