Mario Kart 8 getting Legend Of Zelda DLC (November), along with Animal Cross DLC (May 2015).

[Frogger]

I'd put money on the DLC being bundled with a new Smash Wii U bundle this holiday. Get a new Wii U and you're basally forced to buy a copy of MK8 to utilize the DLC. Bam. Hire me, Nintendo.