Stop me when you've seen this matchup before: SS3 Future Trunks throws hands with SS4 Goku. You haven't, because Dragon Ball Heroes exists to answer the questions the main series never will. The plot is basically a skeleton holding up 56 episodes of what-if fights, and it knows exactly what you're here for: impossible power combinations and transformations that have no business existing in canon, deployed with zero apology. This is fan fiction with a budget, made by people who get that Dragon Ball stopped being about story the second someone figured out how to go Super Saiyan again.
Goku and his allies face an unprecedented threat when they're trapped on Prison Planet, a mysterious world designed as the ultimate battleground. Ancient villains thought long dead roam free here, their power amplified by the planet's sinister machinery. The Z-fighters must navigate a labyrinth of deadly challenges and unexpected enemies while uncovering the truth behind their imprisonment. With time running out and stakes higher than ever, the group confronts corrupted versions of themselves and warriors from alternate timelines. Each battle pushes them further into a conspiracy that challenges everything they believe about the multiverse. Survival means mastering new transformations and unlocking hidden potential, but every victory comes at a cost. Prison Planet thrives on the kind of escalating action that rewards longtime Dragon Ball fans while keeping the pace relentless. It's pure spectacle: characters testing their limits against impossible odds, bombastic power scaling, and the kind of chaotic energy that makes the franchise tick. If you want wall-to-wall combat with universe-shattering stakes and no time for plot breathing room, this delivers exactly that.