It will premiere in April 2019
During the event of One-Punch Man Maji Gakuensai the newest teaser for the upcoming new season of One Punch Man has been revealed; also a premiere date has been decided which it will be in 2019. You cna watch the promo bellow:
Jam Project will be in charge of the opening.
Chikara Sakurai will be the new director at STudio J.C. Staff; Yoshikazu Iwanami is the sound director.
Via: Crunchyroll Latín América (Spanish)