The feature film for Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of Orion! made its Japanese debut on February 15th, 2019 and it’s done pretty decently there.
Shigeki Kimoto is on board with the character designs and JC Staff on the animation.
However, Bell Cranel’s grandfather told him a different reason: it’s a great place to rescue (and subsequently meet) girls!