According to a leaked list on the Nintendo UK Store, there are a bunch of new DLCs scheduled for Mario Kart 8, we will have new tracks, new characters, new cars and lots of new features.
Each pack will add three characters, four vehicles and two cups, each with 4 tracks. Some classic tracks will return, like Wario Gold Mine from Mario Kart Wii , but there will also be new tracks. These packs will not be limited to the Mario , adding characters, tracks and vehicles from The Legend of Zelda , Animal Crossing and F-Zero series.
Mario Kart 8 Pack 1 adds the characters Tanooki Mario , Cat Peach and Link , scheduled for release in November this year. Mario Kart 8 Pack 2 , scheduled for May 2015, adds the character Dry Bones , as well as Villager and Isabelle , from Animal Crossing .