Suppose the Wii U didn't fail as badly as it did. Instead, it simply was 50-50. Not too bad, but anything memorable.
How many sales would it have needed to reach? Currently, the Wii U is at 13 million. It trails the Xbox One by 8 million, with the PS4 twenty-seven million units ahead.
I'd have to say that selling 30-50 million units would have been considered the line between success and failure. It's legacy would be mixed, but overall positive because it would be a potential sign for nintendo's home consoles to turn around.

Besides the Wii miraculously bringing in 100 million units(fyi the chart is outdated, but it still works), Nintendo's home consoles are decreasing in sales.
NES: 62 million
SNES: 49 million
N64: 32 million
Gamecube: 21 million
Wii: 100 million
Wii U: 13 million
NX: ?
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12/22/2016- Made a bet with Ganoncrotch that the first 6 months of 2017 will be worse than 2016. A poll will be made to determine the winner. Loser has to take a picture of them imitating their profile picture.












