'G.I. Joe 2: Retaliation' (not to be confused with Dane Cook's 'Retaliation') is one of the more curious films currently in production. Only three characters are returning from the first film, so is this a direct sequel? Is it a reboot? I'm so confused! But I'm also strangely intrigued. And now here's this: A picture of Dwayne "The Rock" Johnson, standing on some sand. OK, maybe this picture on its own isn't too exciting. The Rock plays a character named Roadblock -- when you think about it, those are two very interchangeable names. It's like saying that an actor whose real name is Pete is playing a character named Gene. What's the difference?