Bioman must rescue two boys who possess an ancient treasure map that leads to Biobase, making them targeted by Gear.

Momotaro carries this sword into battle against injustice in shogunate Japan. Aided by ninja he must now wage a furious battle against the terrible “Ran” clan, villains in league with Ohara Ukon, a bitter samurai nursing a grudge against the shogunate. Together the ruthless conspirators will threaten the foundations of shogunate rule over Japan. Only the relentless slashing sword of Momotaro may save the nation from the Ran clan's army of killers.

The Space Empire Zangyack forms an alliance with the Black Cross King, the resurrected form of the Gorengers' enemy the Black Cross Führer, in order to invade Earth with other revived Super Sentai enemies. The Gokaigers, along with the Goseigers, who have lost their powers from the Legend War, must team up in order to fight against the new enemy.

The Kamen Rider Club discovers that the Dai-Zangyack fleet is moving towards Earth, led by Captain Marvelous as their Great Emperor. With many revived Super Sentai villains under his command, Captain Marvelous plans to obtain the Great Power of the Kamen Riders which is said to be "Ultimate Treasure in the Universe". Meanwhile, Tsukasa Kadoya becomes the Great Leader of Dai-Shocker once again and recruits past enemies of the Kamen Riders to take down the Super Sentai teams.