So, in one of Nintendo's recent financial reports, they revealed that Mario Kart 8 had shipped (+digital) 4.77m units in 2014. Relative to the 9.2m Wii U's that have currently been sold, that's an attach ratio of 51.8%. It's a well known fact that Mario Kart is a series that has crazy legs, so this game will continue to sell as the generation goes on. The question is: will MK8 have the highest attach ratio of any game this gen? Discuss.