MK8 sold so well because Wii U owners were starved for Games

[tbone51]

The answer is no. It would of sold just about the same if they're were any other game(s) in between DK+MK8 release.

Edit: Actually depending on what game(s) came out during March-May, MK8 could of sold even more! Ex:If  SSB released, the install base would of been much bigger by the release of MK8