That film is Reiketsu-hen, aka Cold Blood, and now has some new details on it.
With the scond film in the Kizumonogatari trilogy, Nekketsu-hen, aka Passionate Blood, out on August 19th, 2016 in Japan, the focus begins to move toward the third film.
The film have set Akiyuki Shinbou as the chief director with Tatsuya Oishi directing it.