Less than two months ago, Jason Reitman's dram-com about a high-flying corporate hatchet man had a lock on Best Picture and Best Actor (George Clooney). Then two movies showed up. The big one was Avatar, a picture of gigantic ambition and achievement. The little one was Crazy Heart, with a winning — Oscar-winning? — turn by Jeff Bridges. Reitman may have to settle for Best Adapted Screenplay.