Although in many parts of the country it's still sweatier than a sumo wrestler in a sauna, the U.S. summer box office will be wrapping up the season as we head into Labor Day weekend. How did things go over the last few months? Better than expected, according to The Hollywood Reporter. Going into this weekend, "Nielsen EDI data showed domestic tallies of $3.96 billion that are sure to rise to beyond $4 billion by the Monday holiday." The box office was surprisingly strong "thanks to unsurprisingly robust sequels and a shockingly lucrative performance by the latest installment in a 19-year-old superhero franchise." The latter refers, of course, to The Dark Knight, although I have to wonder why its success is considered so shocking. Was anyone expecting, say, Meet Dave to siphon off some of the Bat's profits?