Maybe not 15 million, but still below Gamecube. Wii U is still tracking WAY below the Gamecube in the US, and was only able to beat its sales in one month, June, and barely at that. Japan sales are tracking lower IIRC, and Europe as well. Just because It has had a good month, it doesn't mean it'll end over 20 million.
Just like the Gamecube, the Wii U has very little 3rd party support. With only 1st party games to look forward to, the Wii U will be mainly selling to Nintendo fans. Every generation so far, sans Wii, has shown that even nintendo fans are striking in numbers.
US holiday seasons will be favouring Sony and MS more than Nintendo (besides the 3DS), Europe will still be Sonlyland, and Japan home console sales are already bad.
20 million is wishful thinking.
Won bet with t3mporary_126 - I correctly predicted that the Wii U's LTD at the end of 2014 would be closer to 9 million than 10 million. http://gamrconnect.vgchartz.com/post.php?id=6673287
