Rider Wars is the third film in the Hero Wars Series and is a crossover between the Masked Rider series and the Kamen Rider and Neo-Rider series', and will also feature some Power Ranger members.
The Riders are usually fighting in order to protect their worlds, but this time around they are fighting each other. It seems like the fighting is connected to a secret alliance with Count Dregon's and Xaviax's forces. Masked Rider, Dex Stewart, is trying to defeat the alliance and in order to do that he must defeat Feudal Rider Orange. Dregon and Xaviax are using monsters from different series and are trying to continue where Shocker left off. The Express Squad and Dino Charge Rangers and Tommy Oliver will be joining the fight to protect world peace.