The second season of One Punch Man will be produced at JC Staff with a new staff. People hyped up Madhouse and OPM so much and ironically they're not doing Season 2.
Season 2 will be directed by Chikara Sakurai.
Sound director is the legend Yoshikazu Iwanami, so we'll be good on that front. Char designer, scriptwriter, and musician are the same as S1. We'll just have to wait for some PVs to get a glimpse.