Later, Ryōma returns piloting the Black Getter Robo to aid the new Getter team against Dr. Saotome, who returns with Stinger and Cowen when Shin Getter Dragon re-activates and continues its evolution. It was also revealed that Kei was Dr. Saotome's younger daughter and Michiru's younger sister, who was adopted by Benkei. Soon the invaders put their true plan into action by transforming Jupiter into a Getter Ray Sun and Ganymede, one of its moons, would soon go on a collision course with Earth, prompting both the old and new Getter teams to spring into action to save the planet.