There’s a famous little piece of Doom fan fiction, in which protagonist John Stalvern waits, demons are in the base and he plasmas them with “his palsma rifle”. It’s pretty funny. Here’s my favorite version, complete with soundtrack and voice-overs. I bring it up because Dragonball Evolution ends the exact same way.
Our hero Goku, about to face off against the evil green-skinned alien Piccolo, yells about how he is going to defeat him as well as the Oozaru, an apocalyptic creature that will appear during the solar eclipse that’s about to happen. Their exchange follows:
Goku: “NO I MUST FIGHT THE OOZARU.”
Piccolo: “No, Goku. You ARE the Oozaru.”
And then Goku was the Oozaru.