Air amphibious assault ship SIVA (空中強襲揚陸艦 SIVA) (abbr. SIVA) is a science fiction anime movie produced by Western Entertainment, Musashino Animation, and GPU. However, GPU was later excluded from producing after their contract revoked.
Firstly Western Entertainment let GPU making SIVA. However, GPU demands much money to Western Entertainment while they almost did nothing on it. Gotaro Katsuragi, the principal of SIVA, was upset about this. He later let Musashino Animation make SIVA.
Thanks to some producing drafts of Time Hippopotamus are still retained, Musashino Animation can make SIVA more quickly. However, the GPU wants to take copyrights back when knowing that Musashino Animation is making SIVA. In response, Musashino Animation and Western Entertainment revoke their contract with GPU because GPU is not following the contract. The movie is finally released in February 2019 in the movie world.