Jonah Hex, the gunslinging antihero introduced by D.C. Comics in 1972, was really just Clint Eastwood’s Man With No Name in need of plastic surgery, but for this big-screen adaptation, screenwriters Mark Neveldine and Brian Taylor (Crank) have endowed him with the handy ability to interrogate corpses. The result, messily directed by Jimmy Hayward, begins affably enough as a random slew of Leone-style squint-a-thons and shoot-outs but then loses it way in a dopey, anachronism-happy sci-fi plot: it seems that Eli Whitney (who died in 1825) built an apocalyptic weapon for the Union during the Civil War, and when it falls into the hands of an ex-Confederate terrorist (John Malkovich), President Grant (Aidan Quinn) knows that only Hex (Josh Brolin) can stop him.