The official website of Gantz:O has announced additional cast members, a new key visual (shown), and a trailer for the movie. The trailer is titled "Love" and reveals footage of the 3DCG film, while the visual says "I will certainly live and return." The film will premiere on October 14 in Japanese theaters and will be screened in advance between August 31 and September 10 in the Venice International Film Festival in Italy.

Cast
Anzu Yamasaki: M.A.O (Mao Ichimichi) (Wakaba*Girl)
Jouichirou Nishi: Tomohiro Kaku (Hana to Alice: Satsujin Jiken)
Reika Shimohira: Saori Hayami (Akagami no Shirayuki-hime)
Yoshikazu Suzuki: Shuuichi Ikeda (Mobile Suit Gundam)
Nurarihyon: Masane Tsukayama (Fate/Zero)
Susumu Kimura: Masaya Onosaka (Baccano!)
Sanpei Taira: Kenjirou Tsuda (Gangsta.)
Tetsuo Hara: Teruaki Ogawa (Ginga Densetsu Weed)
Kei Kurono: Yuki Kaji (Shingeki no Kyojin)





Source: Ota☆Suke, Deadline