This is the actual ending.

The countdown to destruction has begun! All will join to reclaim an Edo in grave peril!

Earth is facing its darkest days, and the members of the Odd Jobs must come together to save it from an otherworldly menace.

Old allies Gintoki, Takasugi, and Katsura strive their hardest for their own ideals, but standing in their way is someone with whom they share a sad history: Utsuro, an alternate personality of their former teacher and mentor, Shoyo. Having been spawned by Altana, the energy that fuels all planets, this immortal fiend has regenerated multiple times until finally becoming Utsuro, the ultimate enemy... And he intends to take down the entire world in order to end his own life.

Gintoki and the others set out to fulfill the wishes of their teacher Shoyo and thwart Utsuro's plans. Shinpachi, Kagura, the Shinsengumi, members of the Kabuki District, and even former enemies will join their fight.

As Utsuro's power grows, Takasugi fights for his very life.

Will Gintoki be able to put an end to all this?!

[Source: Eleven Arts via Crunchyroll News]