Every prequel is a badly told joke; the kind where the comedian shoehorns-in extra details, adding “oh yeah, and the penguin was Jewish” after the punch-line. Prequels are even worse than a bad joke, in fact, because what they add is always unnecessary. They’re the story before the story, based on a false premise: that the audience cares what happened before. This is the worst kind of craven, Hollywood-thinking. In effect, a prequel says: we’re so out of ideas, so lacking in integrity, we’re not even satisfied with copying good ideas (in sequels) any more. We need a new way to defame the original, so we’ve come up with this: the prequel, wholly useless and asked-for by no-one. I give you: Prometheus.