Both The Battle Royale Running Race and Race of Relativity somehow appeared on the episode page. They even have synopsis, too. The Running Race involves Minnie and Figaro entering it and Race of Relativity involves Millie and Melody joining a race with Minnie to spend time with her. These are cool and hopefully they could be real.
If they might do another cars movie, I like the movie to be a bit like Cars 2. It may involve Cruz Rameriz as the upcoming protagonist and Jackson Storm seeking revenge for his lost at Florida. I also like to see Miles Axford and his gang escape and convinced Storm to team up and seek revenge on Lightning McQueen and his friends.