Update: Shin’en has now stepped forward with the news officially. The update launches in September. #FastRmx #NintendoSwitch REMIX UPDATE coming in September 2017. Six new tracks, two new cups and first release in japanese eShop! pic.twitter.com/8CaFcqTvYH — Shin'en Multimedia (@ShinenGames) August 22, 2017 We’ll have more from Shin’en in the near future. Original: Shin’en isn’t done with its Switch eShop...