http://www.techradar.com/news/nintendo-announces-mario-kart-tour-will-be-its-next-mobile-game

Nintendo has announced its next mobile game, and it'll be based on the company's long-running Mario Kart franchise. 

We don't have any other details about the game other than the name – Mario Kart Tour – but presumably it'll feature the same fast-paced powerup-fuelled racing mayhem that the series is known for.