In a playfully cheeky bit of piggy-backing, Ice Age 4 has just been given a new trailer in the form of a parody of the upcoming Batman movie. The trailer, titled The Dark Nut Rises, features hapless old favourite, Scrat the sabre-toothed squirrel cavorting in typical fashion. Scart plays the part of Scratman in the trailer but it's teasingly short, although we guess that's the point - leave 'em wanting more!