You hear a title like The Man Who Killed Hitler and Then the Bigfoot and you might get a certain idea in your head about what kind of movie you're walking into. You probably think silly, campy, maybe with a dash of Grindhouse (especially after you see the gorgeous poster.) You would be wrong. This Sam Elliott showcase isn't the camp creature feature you're expecting, it's something much more interesting, if perhaps not as fun. The feature debut from writer/director Robert Krzykowski technically lives up to its title -- Elliott stars as a man who, many …