The current issue of Kodansha’s Monthly Afternoon magazine has announced that the second season of the anime adaptation of Tsutomu Nihei’s Sidonia no Kishi (Knights of Sidonia) manga will be airing next spring. In addition, a new animated film will be releasing next March and an anime adaptation of Nihei’s Blame! will also be produced.
— デコ (@Decors1215) November 19, 2014
The second season of the anime will be titled Sidonia no Kishi: Daikyuu Wakusei Seneki (Knights of Sidonia: War of the Ninth Planet). The first two episodes of the series will be revealed privately at a Sidonia no Kishi being held on November 23th, before its regular broadcast next Spring.
The announced film will be a recap compilation of the 12 episodes from the anime’s first season. It will also include new scenes and updated remastered audio for its theatrical release. The compilation film will be releasing in Japanese cinemas in March 2015.
Last, a new anime adaptation of Tsutomu Nihei’s Blame!manga has also been announced. Nihei produced the manga before Sidonia no Kishi, which ran from 1998 till 2003 for a total of 10 volumes. It also received an anime adaptation in the form of 6 web specials in 2003 from Group TAC (Igano Kabamaru , Tantei Gakuen Q). The upcoming adaptation will be produced and shown alongside Sidonia no Kishi: Daikyuu Wakusei Seneki, though whether it will be a full TV series or a series of specials have yet to be revealed.
Here is the announcement for the anime’s second season:
Sidonia no Kishi (Knights of Sidonia) is a manga series written and illustrated by Tsutomu Nihei. The series debuted in April 2009 in Kodansha’s Afternoon magazine and to date there has been a total of 13 compiled volumes released. An anime adaptation of the series was produced in April this year for a total of 12 episodes. The anime is produced by Polygon Pictures, in their first full TV anime production. The series is directed by Koubun Shizuno (Detective Conan, Hyakka Ryouran: Samurai Bride) with Sadayuki Murai (Natsume Yuujinchou, Mouryou no Hako) handling the series composition and screenplay, with Noriyuki Asakura (Rurouni Kenshin: Meiji Kenkaku Romantan) composing the music.
Sidonia no Kishi/Knights of Sidonia synopsis from Haruhichan.
It’s been a thousand years since the Gauna, a strange alien race with no known method of communication, destroyed the solar system. A portion of humanity managed to escape using enormous “seed ships” like the Sidonia, which have allowed them to maintain the population while drifting through space. Nagate Tanikaze is a young man who has been raised deep in the bowels of the ship. When he goes into training to pilot the huge robotic weapons known as Gardes, Nagate is entrusted with piloting the legendary unit known as Tsugumori. Nagate and his fellow pilots put their lives on the line against the Gauna, in the ultimate battle for the survival of humanity!
The second season of the Sidonia no Kishi anime, Sidonia no Kishi: Daikyuu Wakusei Seneki, will be airing in Japan from April next year, during the Spring 2015 anime season. A film covering the anime’s first season will be released in Japan sometime in March, with additional scenes and new audio. And finally, a new anime adaptation of Tsutomu Nihei’s Blame! will air alongside the Sidonia no Kishi 2nd season.