The 215th chapter of ONE (Mob Psycho 100) and Yusuke Murata’s One Punch Man manga revealed that the anime adaptation would have season 3. The announcement was also made through the One Punch Man official website. Chisaki Kubota, the character designer for seasons 1 and 2, drew the teaser visual for season 3. Other than Kubota’s involvement, there is no confirmation about any returning cast or crew.
— TVアニメ「ワンパンマン」公式 (@opm_anime) August 18, 2022
The synopsis for OPM season 3 is described as follows;
Saitama started out as being a hero for fun. After three years of “special” training, he became so powerful that he can defeat opponents with a single punch. Now, alongside Genos, 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 predictions about the Earth’s doom are coming true. In the midst of this crisis, the “hero hunter” Garou makes his own appearance.
‘One Punch Man’ Season 3: How One Man Took Over 2015
ONE and Yusuke Murata launched the One Punch Man manga on Shueisha’s Tonari no Young Jump website in 2012. The series is a remake of ONE’s original web manga series. VIZ Media is currently releasing the series digitally in its Weekly Shonen Jump manga anthology.
The overall story for One Punch Man is described as follows;
Every time a promising villain appears, Saitama beats the snot out of ’em with one punch! Can he finally find an opponent who can go toe-to-toe with him and give his life some meaning? Or is he doomed to a life of superpowered boredom?
The first anime season for One Punch Man aired in Japan from October to December 2015. It gained a large following almost immediately due to its amazing animation (done by Studio Madhouse), over-the-top humor, story, and, most importantly, Saitama (and or Genos). Viz Media and Daisuke both streamed the anime as it aired outside of Japan. It then premiered with an English dub on Adult Swim in July 2016. Now, it is available on DVD through VIZ.