Dragonball Z: Era of Trunks

Dragonball Z: Era of Trunks is based off of the future timeline of future Gohan and Trunks.

Plot
After Goku dies by a heart virus, the Z-Fighters are killed by two heartless androids, leaving only Gohan, who has finally become a super saiyan. Now Gohan brings it upon himself to stop the evil duo.

End of Goku Saga
Freiza's Counter Attack - While waiting for Goku's return, Gohan and the Z-Fighters see the return of Freiza, with her father, King Cold.

Goku's Return - Before Frieza and Cold can destroy Earth, Goku returns to Earth and puts an end to Freiza, once and for all

The Instant Transmission - Goku explains how he got away from Planet Namek, then demonstrates a new technique he learned

The Heart Disease - After three years of peace, Goku falls ill, to a radical heart disease, so Bulma and Dr. Briefs try to find a cure. Meanwhile, the Z-Fighters recap thier memories with Goku.

Fall of Goku - After Bulma fails to find a cure, Goku dies by the disease and they hold a funeral, burrying him next to his Grandpa Gohan.

Android Saga Saga
Attack of the Androids - Six months after Goku's death, two Androids appear at west city and the Z-Fighters engage them in battle.

Picollo's Final Battle - The warriors continue their battle against the androids, but start losing. Picollo fights, but he becomes the first warrior, fallen.

Super Saiyan Vegeta - Vegeta arrives and battles the androids.

Fall of the Dark Prince - Vegeta begins losing his battle against the evil duo, and quickly falls, leaving Gohan and Trunks as the last of the saiyans.

End of the Z-Warriors - krillain, Yamcha, Tien, and Gohan are the last remaining Z-Warriors, but Gohan becomes the last warrior standing.

Another Super Saiyan - From anger, by his fallen friends, Gohan finally becomes a Super Saiyan and tries to retreat, but not before getting a beating from the androids.