THE ROCK INSIDE THE ELIMINATION CHAMBER?

The official poster for the 2013 WWE Elimination Chamber PPV features The Rock, John Cena, CM Punk, Ryback, Big Show and Sheamus, teasing that all six would be involved in a major way at the last PPV prior to Wrestlemania 29.
If Rock works inside the Chamber, that would be the first time he's ever done that match.
You can check out the poster below.