The Gokaigers board Gokaioh and Goujyujin to face the massive Zangyack Empire's invading fleet, but despite making full use of the Great Powers, both are defeated, and Akudos Gill makes a statement to the people of Earth that by sunrise of the next day, the world's entire population will be annihilated by his forces. Hurt and scattered, the space pirates wander through the city helping those who are suffering from the invasion, including some familiar faces they met during their journey. While trying to save a woman covered by debris, Gai is assisted by Goushi, also known as Mammoth Ranger from the Zyurangers, who insists that the Gokaigers must use the Greatest Treasure in the Universe to protect the Earth, regardless of what would happen with the other Super Sentai heroes. Reunited at the wrecked Gokai Galleon with the others, Gai tries to convince them to make use of the Treasure to erase the Zangyack, but much to his surprise, they do not agree with him, claiming that using the Treasure would not only erase the Super Sentai from history, but also take from the people of Earth the hope and courage that they learned from them. However, they leave the final decision at his hands, and Gai ultimately destroys the Treasure with the Gokai Spear. The next day comes and Dairando marches forward with an army of Gormin, Zugormin, and Dogomin to start his extermination campaign, but is stopped by the Gokaigers who claim that they will face him not only as pirates, but as a Super Sentai protecting the Earth. After disposing of Dairando's reinforcements, the Gokaigers launch themselves against him.