Judge Dredd: Grud is Dead by James Swallow and Simon Jowett, directed by John Ainsworth.
A bizarre faction of the Catholic Church are involved in a plot to create a new God and Judge Dredd has to travel to Rome and team up with Devlin Waugh to prevent them from unleashing chaos.
The whole subject of religion in Mega-City One is a bit complicated with characters using Grud as an exclamation instead of the word god, which the editors wanted to avoid in a children's comic. And here we have the church trying to restore the concept of God to the world of Dredd. On top of the that we have the renegade, vampire exorcist Devlin Waugh who, I confess, is a character who I know nothing about but he is played with considerable relish by Peter Guinnesss.