The January 2015 issue of manga magazine Afternoon recently revealed that an anime adaptation of Knights of Sidonia is back for a compilation movie version in March 2015 and TV series on April 2015. This is the visual key for the movie here:
There is even a hint that Blame!, another work by Tsutomu Nihei will find its way into the production. It might make its way into episode 8 of the new season. However, it is currently unknown if it will be expanded into a full blown anime series or not. The new TV series will be titled Sidonia no Kishi: Daikyuu Wakusei Seneki/War of the Ninth Planet, where the first 2 episodes will be revealed at a closed private function on 23 November 2014.
In short, the movie will be a recap of 12 episodes of TV series and includes a few new scenes and updated remastered audio for the theatrical version. No news about the casting or the staff for the second season yet. The trailers below is at first an announcement for new TV series and the rest is for the movie:
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