You know, now that I think about it, I wouldn't mind a John McClane prequel, just as long as it's nothing like any other Die Hard movie. McClane at the Police Academy just trying to graduate? McClane's first case as a detective trying to solve a murder in classic film noir? McClane constantly having to write speeding tickets to the same guy over and over again? Sure. But having a prequel where young McClane has to stop an elite team of highly coordinated terrorists and thieves set before Nakatomi Plaza is a disaster.