According to the LA Times, Epic Mickey 2 only moved 270,000 copies in North America on the Xbox 360, PlayStation 3, Wii and Wii U combined by the end of 2012, which is a disaster compared to the 1.3M units sold from November 2010 to the end of the year on the Wii for the original Epic Mickey.
So far, Epic Mickey 2 has sold only 580,000 units worldwide to date, with 440,000 of those sales coming in North America.
Of course, part of the reason is simply that Epic Mickey 2 is not very good. The game received savage reviews (PS3 Metacritic: 59, 360 Metacritic: 59, Wii U Metacritic: 56, Wii Metacritic: 64), and unfortunately for creator Warren Spector, there is no divide with fans, as fans have given a worse score at Metacritic as well.
Strategy Informer is no different, having given the game a 5.0/10 score in its review, blasting the controls and the lack of a coherent story.