Companies of all shapes and sizes hoping to complete million-dollar mergers often face some tough questions from U.S. regulators. The process is no different for the less-talked about industries, like movie theater ad companies (you know, the companies responsible for making you sit through commercials before a seeing a movie?). And so, the U.S. Justice Department filed a lawsuit to stop the $375 million merger of the industry’s two biggest players, National CineMedia Inc and Screenvision LLC. [More]