Set two years after the events of Ultraman Trigger, an ultra-ancient threat re-emerges, leading to the return of Ultraman Trigger and Ultraman Zett to save the day, but all is not as it seems.
Ten years have passed since the defeat of the Zangyack Empire, and the Gokaigers have seemingly disbanded and gone their separate ways. On Earth, “Super Sentai Derby Colosseum” has become the hottest gambling venue ever, with various Super Sentai battling each other for charitable causes. Suddenly, Captain Marvelous appears, issuing a challenge to the Colosseum’s administration and those who work for them... including Gai Ikari! Is it the Gokaigers or the people of Earth who have changed in the past ten years? And what of Joe, Luka, Doc, and Ahim? After ten years, an extraordinary battle is about to begin…
The 2021 Super Sentai, Kikai Sentai Zenkaiger, debuts in a movie! Previous generations of monsters show up but team leader Zenkaiser won't let them have their way! Previous generations of Red Rangers run into battle too! Zenkaiser isn't a Red Ranger, but does that even make sense? With the power of the Machine World, he'll defeat them at Full-Force Full-Throttle!
Kei Hosogai(細貝 圭 Hosogai Kei) is a Japanese actor and musician most notable for his roles as Hiyoshi Wakashi in the Prince of Tennis Musicals and Basco Ta Jolokia in Kaizoku Sentai Gokaiger. From ages 6–9 and 11–23, he lived in the United States, primarily in Seattle, Washington, and in the state of Hawaii; because of this, he is fluent in English. He was the bassist of the rock band Cocoa Otoko and is represented by the Japanese agency GMB Production.