He said he’d be back and he wasn’t kidding. Actor-turned-politician Arnold Schwarzenegger has officially signed on to star opposite Sylvester Stallone in the upcoming action thriller The Tomb. Stallone will be playing the role of Ray Breslin, an expert on structural security who’s analyzed every high security prison. But his skills will be put to the test when he’s forced to escape from a prison he himself designed to be perfectly secure. Schwarzenegger, the former Governor of California, will be playing a fellow inmate who fights to keep the prisoners from turning on each other in their struggle to stay alive. The Tomb is expected to be released sometime next year. Fortunately you won’t have to wait till then to see Schwarzenegger and Stallone on screen together — they both star in the highly anticipated sequel The Expendables 2, which hits theaters August 17.