“The Producers opened as a monster hit on Broadway. It was supposed to stay that way, packing houses for years. But it hasn’t turned out that way. “Less than three years after its incomparably auspicious opening, The Producers, in the eyes of many on Broadway, has become an underachiever. Its box office grosses, which set record highs — more than $1.2 million per week — in its first year, have fallen about 20 percent in the last 12 months. It now ranks below newer shows like Hairspray and Mamma Mia! as well as The Lion King.”