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 粉丝 are detecting a bit of a Sword Art Online spoof in the new designs.
给 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