Stop with the "can anything save the Wii U", "can wiiu outsell console X", "can Wii U this or that", and all other related BS! Seriously, enough with this nonsense.
Wii U will be saved the minute it starts turning profit for the company. So far Nintendo lost money with it, in the future they might end with a profit. That's how you define if a console was successful or not. Correct me if I'm wrong cuz I'm not sure, but I think X360/PS3 made MS/Sony both lose money. They sold over 80m units, was that a success? Sure people might have enjoyed those consoles (I know I enjoyed my PS3) but Wii U owners are also enjoying their consoles, so that alone makes the console successful i their eyes. Profitability will make it succcessful in shareholders eyes. Period.
Some people on this forums seem to believe units sold = success = company making money = owning a product better than others do = being happier with the console purchase = being a superior human being. Well newsflash people: units sold =/= success =/= company making money =/= owning a product better than others do =/= being happier with the console purchase =/= being a superior human being. Actually their even just slightly related concepts and depend on who the subject is.
We'll only know if it was successful or not at the end of its life, and even then that's from the shareholders point of view, because from the consumer's point of view I bet that for the majority of them the console is already a success. I know for me it is.
For me, personally, it's hard to go a whole generation without Nintendo, as it is to go without 3rd parties, that's why every generation I go with a combo Nintendo + Sony/MS.
Lastly, a provocative question, how do you rate a successful console:
A) The one where they deliver what they promised and then some?
B) The one where they promise 1080p 60fps, the 2nd coming (aka Watch Dogs, Destiny, Driveclub, etc) and disappoint the fans?