Since the end of the 1st season at the end of June 2015, the series has been quiet on a return to television. Now, an announcement trailer has confirmed Is It Wrong to Try to Pick Up Girls in a Dungeon? will return for a second season.
The original theatrical anime titled Is It Wrong to Try to Pick Up Girls in a Dungeon? -The Arrow of Orion- was announced and Fujino Ōmori, the original light novel author of the series, is lending a hand with some of the script. The original voice actors for Bell Cranel (Yoshitsugu Matsuoka) and Hestia (Inori Minase) will make their return for the movie.
However a solid date has not been set yet for both new season and movie. Expect an update for a release in the near future for both.
Source: Comic Natalie