Rumor Mill: New Mario Kart 8 DLC leaked on Youtube?

A video from Youtube channel Gamer Central was posted alleging that a New Super Mario Bros. U themed DLC pack for Mario Kart 8 was coming to the Wii U eShop. The supposed leak is classic blurry Youtube fare, but the level of effort is pretty impressive for a fake.

The quick ad spot seems to announce Bowser Jr., Kamek, Birdo, and Nabbit as new characters to race in Mario Kart 8. Also two unspecified mystery characters were present. Also announced in the ad were 8 new tracks and 4 new vehicles. Somewhat interesting stuff - but more curious is what is happening at Nintendo lately? Operational security seems to have been abandoned.

Anyways here's the video: