At one point in the film, Enzo is asked if he was bitten by a bat in order to become a superhero. Claudio Santamaria (Enzo) previously served as the voice of Bruce Wayne/Batman for the Italian dubbing of Christopher Nolan's Batman trilogy and also for The Lego Movie's Batman. Also, the off-screen voice heard from a TV reporter in the closing sequence was provided by Adriano Giannini, who dubbed the Joker in the same series of movies.
Luca Marinelli was inspired in his performance as the villain "Zingaro" by Ted Levine's role as Buffalo Bill in The Silence of the Lambs.
Director Gabriele Mainetti also composed the musical score.
Filmmaker Anurag Kashyap cited this as one of his favorite film
Italian censorship visa # 110296 delivered on 10 December 2015.