It's a good film, but there is no reference in credits to "The Laughing Man" (included in "9 stories") by J. D. Salinger but it's obvious that the short is based on it. Did the screenwriters forget to mention it? Is the omission unintentional? They are changed the superhero name, but they let unchanged the name of the group of children (Comanches) and the name of the "Jefe" (Chief in Spanish), so I can't help to think the omission isn't unintentional. I can't understand how it is possible that no one in IMDb has noticed that fact and nobody has mentioned it. The history works very well as Salinger's does and because Salinger's does.