Bofferbrauer on 19 January 2015
I think a 50k Baseline is possible - if there are no long droughts in between releases. Having quite a few memorable games and an unique lineup will probably also help to attract those who want to go multiplattform nd have a Wii U as secondary console.
While I fear the Wii U will drop below the aforementioned 50k, I don't think it will fall below 35k anytime soon again.
