Trio Rider is the third installment to the American Neo-Rider Series and the fifth Rider adaptation overall. It is the second part of a prequel trilogy to Power Rider as well as a sequel to Duo Rider. It'll be based on Kamen Rider OOO.
After the threats of the Gaia Drives have been stopped and after the Carroways have learned the errors of their ways, Windy City becomes a peaceful place once again. Evan Holmes, Sam's younger brother, returns to Windy City after years of finding a place to live. He then reunites with his brother and meets Philip and Anna. Evan then accompanies Sam on a case about a mysterious coffin-like box whose seal is a driver with three coin slots. Sam and Evan find this box and Sam opens it, but knowingly releases coin-based monsters, known as the Greedemons, from their 800-year slumber. Now they have begun to attack humans & feed off of their desires. Worst of all, a mysterious earthquake nearly knocks Sam inside, but he was able to hang on to edge. Evan tries to save his brother, but Sam gives Evan the driver & three Animal Coins, coins that channel the Animal Spirits, to fight the other Greedemons as Trio Rider. Sam then loses grip of the edge and falls in. A mysterious company approaches Evan & begins assisting him in his fight against the Greedemons, though their true motives are not clear. As Evan fights the Greedemons & their Minjin monsters, learning more of the Greedemons, he promises to find a way to save his brother.