|“||In Japan, for a long, long time, an amazing secret have been kept about legendary warriors hidden away in a small restaurant.||”|
The movie was first announced on the official ZAG website in 2012 and it is going to be animated in CGI instead of 2D like in the original series.
In 2014, it was confirmed on the official ZAG website that the movie's length is going to be 90 minutes long.
It was revealed on May 5, 2015 that Tanis Chalopin would serve as a composer for the film's score after she posted a score piece on SoundCloud. In 2016, Chalopin have posted the first official trailer for the movie on her official website, but there isn't any dialogues from the characters and the video has a rather low-quality.
Since then, the production for the film is very cryptic since Jeremy Zag didn't make any announcement on Instagram regarding it, making it uncertain if the film is still in production or it got cancelled since the TV series have ended its run in France after its final episode "Sushi to the Future" have aired on April 12, 2015, on Mangas. The last time there's anything involve with the film was the official theatrical trailer that Stephane Juffe posted on Vimeo on November 16, 2017.
- Since it's a feature film, none of the voice actors from the main series would reprise their roles. Because of it, it's unknown who voiced Toro and Ebi in the trailer.
- The trailer confirms that the main setting of Kobushi takes place in Japan.
- Since Ebi doesn't have his stinkypoo family curse and he is noticeably afraid of Néko unlike in the main series, it's possible that the film serves as an origin story for the TV series.
- A footage of the trailer can be seen in a 2016 ZAG Heroez video.
- The film being animated in CGI instead of being traditionally animated is a reference to how the main series was originally going to be CG-animated.