 The character of John Constantine was originally created by  Alan Moore (III) (qv), during his run on DC Comics "Swamp Thing".  However, following his negative experience with  _From Hell (2001)_ (qv) and  _League of Extraordinary Gentlemen, The (2003)_ (qv), Moore decided  to reject all money and credit from Hollywood on any adaptations of  his work. Thus, he gave all the money he wouldve gotten to the  artist who drew the character with him, and rejected his own  "created by" credit from the film.