At this point in his career, David Fincher is a Mount Rushmore figurehead of contemporary American cinema for a lot of moviegoers. But that wasn’t always the case. Flashback to the early ’90s, when Fincher, in his mid-20s and primarily a director of commercials, was tapped by 20th Century Fox to helm the much-anticipated sequel “Alien 3.” The result was disastrous: a $60 million budget blockbuster with a troubled production that scored low with critics and failed to live up to anyone’s lofty expectations.