Michael Mann helming a crime thriller based on the notorious John Dillinger that pits Johnny Depp against Christian Bale may sound like a Hollywood sure-thing. But don’t be surprised if you get a sense that someone has been through your pockets when it’s all said and done. Public Enemies may not rob you completely, but it’s nowhere near the pay-off audiences might expect. The film’s muted palette intends to play to the feel of the 1930′s. Instead, it ironically better represents the film’s pervasive weakness — shades of beige as far as a nearsighted person can see. With such rich, historical material on hand, it’s disappointing that the most wanted thing in Public Enemies is some true depth and color.