Let's face it -- prequels, for the most part, suck. They tend to be even lamer than sequels, which, though often repetitive and pointless, at least get to launch from the previous film's endpoint. Prequels, on the other hand, are forced to operate within the universe of the original movie and can't stray far from the established order of the story that they're leading up to.

So, with 'X-Men: First Class' going back to the JFK years to show how Professor Xavier and Magneto originally pulled the whole mutant funky bunch together, let's look back at the best and worst that the prequel genre has to offer: