Is the entire marketing campaign for Angelina Jolie’s upcoming spy-thriller “Salt” going to be based entirely around the question of ‘Who Is Salt?’  That’s the tagline they put in their trailer, are using for their website, and have now put on the film’s first poster.

“Salt” Poster

In the film, Jolie plays Evelyn Salt, a CIA officer who is accused as a Russian sleeper spy. She eludes capture by superiors who are convinced she is out to assassinate the president. While trying to reunite with her family, she struggles to prove someone else is the traitor.

Starring also Liev Schreiber and Chiwetel Ejiofor, Salt will be released in U.S. theaters on July 23, 2010.