It will have the name of “Highschool DxD HERO”
It has beenr evealed that the newest season of Highschool DxD will premier this April. At the same time they have revealed the character design for both Issei and Rias, which you can see bellow:
The anime will cover the 9th and 10th volumes of the Light Novels and it will focus on the battles against Bael and Cao Cao.
Yoshifumi Sueda (Rail Wars) is directing the anime at Studio Passione (Rail Wars); Kenji Konuta (King´s Game) is in charge of series composition.