The famous quote from the character of Harvey Dent in The Dark Knight says, "You either die a hero, or you live long enough to see yourself become the villain." It's a concept that's been around for some time, with Friedrich Nietzsche having coined what's believed to be the original: "He who fights with monsters might take care lest he thereby become a monster. And when you gaze long into an abyss, the abyss also gazes into you." Well, it seems the BMW XM has found itself in the position not where it's a hero, but where it's about to evolve into the car it sought to defeat, the Mercedes G-Class.