Skagboys just out for the buzz on drugs, to total junkies. It shows how their attitudes and behaviour start to change as they become more defined by the drug and the culture around it". In 2012, Welsh said the prequel was actually initially written as part of "Trainspotting" but was not used in the published version. He later decided he would either erase his old work or use it in some way, as "he had a fear that he might fall under a bus and leave behind 'half-written stuff' which people would publish". He said, "I just went through it and
Dominion: Prequel to the Exorcist scored by the American metal band Dog Fashion Disco (the unusual choice stemming from Schrader's son's affection for the group), while the balance of the score - about an hour's worth - was recycled from Trevor Rabin’s work for the Harlin version. In addition to contributing compositions, Dog Fashion Disco also "finessed" the score as a whole to give it a unity despite its disparate sources. Warner Bros. released Schrader's version theatrically under the title "Dominion: Prequel to the Exorcist" (since "Exorcist: The Beginning" was used by the Harlin version) as a very limited release (110 screens) in May 2005,