A script for the film was written by Brian Cox with Hernandez serving as Associate-Producer. Hernandez was excited to have Valderrama play the lead, stating in an interview, "Wilmer is just drop-dead perfect! Really, it was a lucky break for us getting him to play Diego de la Muerte/El Muerto. He is so completely immersed in the role. For him, it's a chance to play a leading role in a film. And he sees the franchise potential with this character. I mean, he's playing a comic book superhero, how cool is that!?" In the same interview he also praised the supporting cast, saying "The quality of actors should give you an idea about the quality of the script."