I don't think the post is too presumptuous. Even the title uses "to" and not "will". "To" is more prospective whereas a word like "will" is more definitive.To the OP, it's ridiculous to say that this will happen.
My two cents on the subject itself: I honestly wouldn't be surprised. The Wii U is in the third year of its life. If Nintendo really pushes it, we are likely nearing the system's halfway point, and it has yet to sell 10 million units. Unless system sales spike for a long period of time, at its current rate of sales, the Wii U is unlikely to break 20 million sales in the long run, which is bad news for Nintendo. The Gamecube sold the better part of 22m worldwide and barely made a profit for Nintendo. Barely. Even if the Wii U has the same profit line, odds are against Nintendo reaching it.