Nintendo officially announced some new DLC packs coming to Mario Kart 8 this November and May 2015. These two packs will add a combined total of 16 new tracks, new drivers, and new karts.

Starting August 27, you will be able to pre-purchase the DLC for $7.99 (USD) each or $11.99 for both packs. These packs are theme focused with the first being Legend of Zelda themed and the other being Animal Crossing themed.
Pack 1: The Legend of Zelda X Mario Kart 8 (Release Date: November 2014) - $7.99
•3 Characters: Tanooki Mario, Cat Peach, Link
• 4 Vehicles
• 8 Courses

Pack 2: Animal Crossing X Mario Kart 8 (Release Date: May 2015) - $7.99
• 3 Characters: Villager, Isabelle, Dry Bowser
• 4 Vehicles
• 8 Courses

Pack 1 + Pack 2 Bundle - $11.99
• 6 Characters: Tanooki Mario, Cat Peach, Link, Villager, Isabelle and Dry Bowser
• 8 Vehicles
• 16 Courses
• As a bonus for purchasing both packs bundled or individually, buyers receive eight new colors for Yoshi and Shy Guy. Those who advance purchase both packs can begin using the Yoshi and Shy Guy characters immediately.