The official website of the upcoming anime adaptation season 2 of One-Punch Man announced that Madhouse Studio will not be adapting season 2 of the anime. J.C. Staff will be the new studio taking over the adaptation of the anime.
Shingo Natsume ( director for the first season of the anime) will no longer be the director. Chikara Sakurai (episode director for Naruto Shippūden) will be the new director for season 2.
The main voice cast will be coming back to reprise their roles in season 2 of One-Punch Man.
One-Punch Man Series Summary
One-Punch-Man the manga by Murata, Yusuke is the remake of the original webcomic by ONE.
After rigorously training for three years, the ordinary Saitama has gained immense strength. This allows him to take out anyone and anything with just one punch. He decides to put his new skill to good use by becoming a hero.
However, he quickly becomes bored with easily defeating monsters. Hence, wants someone to give him a challenge. All this to bring back the spark of being a hero.Upon bearing witness to Saitama’s amazing power, Genos, a cyborg, is determined to become Saitama’s apprentice.
During this time, Saitama realizes he is neither getting the recognition that he deserves nor known by the people due to him not being a part of the Hero Association.
Wanting to boost his reputation, Saitama decides to have Genos register with him, in exchange for taking him in as a pupil. Together, the two begin working their way up toward becoming true heroes, hoping to find strong enemies and earn respect in the process. [Source]