Works where the plot is driven by a prophecy-only, the prophecy turns out not to be true in the end. Someone wrote it to try and do our brave heroes in.
Live Action TV Angel
's third season revolves around the fallout from the discovery of a prophecy that seemed to say Angel would kill his son. It turns out the prophecy is false, inserted by a villanous demon to try and screw up the outcome of the true prophecy about Angel's son being born. Angel *does* appear to fulfill the prophecy later, when he cuts Connor's throat to stop him goign beserk, though. (Connor lived because Wolfram and Hart give him a new life).