Mario Kart SuperPower Speed

 is a upcoming game in 2013.

Gameplay
This will involve the coins, kart customizing, and bikes. It will also involve a new Double the Coins mode.

Racers (No artwork shown, some users may work on it.)
More characters will appear, as some of them are confirmed.
 * Mario
 * Luigi
 * Princess Peach
 * Yoshi
 * Princess Daisy
 * Toad
 * Baby Mario
 * Baby Luigi
 * Shy Guy
 * Lakitu
 * Wario
 * Waluigi
 * Bowser
 * Donkey Kong
 * Wiggler

Third Parties
Go to the Mario Kart Superpower Speed/Third Party Voting Poll for results.

Nitro

 * Mario Circuit
 * A unnamed racetrack that takes set in NSMB2 World 3
 * A unnamed racetrack that takes set in a snowy valley
 * Gloomy Manor

Retro

 * DS Figure-8 Circuit
 * 3DS Music Park
 * GCN Sherbet Land
 * SNES Koopa Beach 1

Items
TBA

Kart Customizing Parts
TBA

Trivia

 * It is unknown to have the second party characters.