Despite being a "filler" episode, fans have noted that the very first fake ending—a gritty, cinematic battle between Gintoki and Takasugi on top of a burning Terminal—accidentally (or geniusly) foreshadowed the series' actual climax years before it was written. The imagery of their final confrontation and the destruction of Edo in this segment bears a striking resemblance to the eventual "real" ending of the series. The Verdict
If you'd like to dive deeper into Gintama's unique storytelling, I can provide: Gintama Episode 150
A direct and highly detailed parody of the experimental final episode of Neon Genesis Evangelion , featuring characters congratulating one another in a void. Despite being a "filler" episode, fans have noted