Super Dragon Ball Heroes

Following the events of the Tournament of Power, Goku and Vegeta were supposed to be joined in their training on Beerus' planet by Future Trunks after he and Future Mai have returned to the present timeline in their time machine. Future Mai reveals that Future Trunks was captured by an unknown force, and a mysterious figure named Fu confirms that Future Trunks is held on the Prison Planet, a place under the control of Frieza's brother Cooler. Goku and Vegeta reach the planet with Future Mai, encountering their Time Patrol counterparts Xeno Goku and Xeno Vegeta who were sent to retrieve Fu before they are all attacked by a Saiyan criminal named Cunber. The resulting fight against Cunber destabilizes the planet, with Fu escaping capture as Cooler followed, the heroes managing to escape the self-destructing planet with Xeno Goku and Xeno Vegeta returning to their reality. But the event would be revealed to have been part of plan conducted by Hearts, who recruited Cunber and four other inmates (including a cyborg version of Zamasu) for his goal to eliminate Zeno and his alternate counterpart.