According to a post by Nintendo Life, it appears that Best Buy had leaked the sequel to Nickelodeon Kart Racers 2: Grand Prix a few weeks ago, Nickelodeon Kart Racers 3: Slime Speedway. Based on the information we have so far, it looks like it will be releasing later this fall on October 7, just a day less than a year after the release of Nickelodeon All-Star Brawl, and will be coming with a similar $50 price tag.