If they think they can sell more systems (perhaps another year close to 20m) then hopefully they have a bunch of games coming this year to back up that belief (ie 2D Mario, Star Fox?, Prime 4, Prime remake, DK, Z:WW/TP HD, etc). I don't see them needing to increase production unless they've got a lot of stuff in the software pipeline that is close to ready and maybe price cuts on older games as well.
They have Zelda. That is a lot of stuff.
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