Dragon Ball Super

Season 4: Future Trunks Saga

Episode 21: Fill Your Heart with New Hope!! Farewell, Trunks

Fusion Zamasu expresses his disbelief that a mortal could defeat him and then disintegrates. However, as everyone exchanges congratulations, Fusion Zamasu's energy returns and begins spreading over the entire planet. Gowasu explains that Zamasu has cast off his physical form and is trying to physically merge his spirit and energy with the entire universe. Zamasu begins raining destruction down on the Earth and annihilates everything and everyone on the planet except Goku and the others. Zamasu's power is even felt in the present timeline, where Beerus and Whis sense it. Goku looks for another Senzu bean in his pocket, but instead he finds the button that Zeno-sama gave him in the present timeline. Goku presses the button and Future Zeno-sama appears. After Goku explains the situation, Future Zeno-sama decides to erase the future timeline due to the corruption that Zamasu has caused. Gowasu and the Supreme Kai teleport away, while Goku and the others escape using the Time Machine. Future Zeno-sama erases the entire future timeline and destroys Fusion Zamasu. After the others return to the present, Goku and Future Trunks return to what is left of the future timeline. They retrieve Future Zeno-sama and bring him back to the present with them. Goku and Whis bring Future Zeno-sama to meet the present Zeno-sama. Goku fulfills his promise to provide the present Zeno-sama with a friend to play with. Whis also meets another angel, Grand Priest (Daishinkan), who is revealed to be his father and invites him to visit Universe Seven. In the aftermath, Whis devises a solution for Future Trunks and Future Mai. Whis explains that they can return to the future timeline before Zamasu became a threat, which would create a new and safe version of the future timeline with the price of there being two duplicates of both Future Trunks and Future Mai living in the new timeline. The two accept Whis' solution and use the time machine to travel to their new future.