With Gintama: The Movie: The Final Chapter: Be Forever Yorozuya slated to debut in Japanese theaters July 6th, a new visual shows older versions of sidekicks Kagura and Shinpachi against what looks like a post apocalyptic version of the series' alien-invaded Tokyo.
Japanese fans are detecting a bit of a Sword Art Online spoof in the new designs.
Given Gintama's habit of trolling fans, it remains to be seen how indicative this may be of what's actually happening in the movie.
Source: Crunchyroll