15 of the best movie prequels ever

Dominion: Prequel to The Exorcist (2005)

Paul Schraeder's Exorcist prequel was shelved by the studio after executives complained that it was too cerebral – it was replaced by Renny Harlin's Exorcist: The Beginning, shot on the same sets and using the same actors.
Schraeder's film was eventually released as Dominion: Prequel to the Exorcist, proving itself to be an interesting meditation on the nature of evil. Still, it's let down by some truly ropey low-budget CGI, a consequence of its limited release.