According to the official website of the anime adaptation, One Punch Man season 3 is in production. One Punch Man manga artist, Yusuke Murata, previously tweeted that a big announcement will be made on August 18. A new teaser visual drawn by Osamu Kubota, who was in charge of character design for the first and second seasons, has also been released.
It has been more than 3 years since the One Punch Man season 2 was released, and finally, fans will be getting a season 3. The production details, including staff, cast, and the studio, are yet to be announced. According to leaks, One Punch Man season 3 will be animated by a different studio.
Studio Madhouse animated the first One Punch Man season, which aired from Oct to Dec 2015. The second season was produced by J.C Staff and aired from April to July 2019. Nothing official yet, but One Punch Man season 3 is expected to release in 2024.
One Punch Man manga series is based on manga, illustrated by Yusuke Murata. The source material of the manga is the web novel created by ONE. The web novel series is way ahead of the manga, but the anime is based on the manga series, and manga didn’t have enough source material for season 3. Now that the Garou Arc has officially ended, there is more than enough source material for season 3.
Crunchyroll describes the anime series as follows:
Saitama started out being a hero just for fun. After three years of “special” training, he became so powerful that he can defeat opponents with a single punch. Now, alongside Genos, his faithful cyborg disciple, Saitama is ready to begin his official duties as a professional hero working with the Hero Association. However, the frequency of monster appearances is surging and it increasingly appears as if the Great Seer Madame Shibabawa’s prediction about the Earth’s doom is coming true. In the midst of this crisis, the “hero hunter” Garou makes his own appearance.
Source: Official Website