With its attendance slipping, the Rock and Roll Hall of Fame and Museum in Cleveland hopes yet another new director — one familiar with superhero feats — can resurrect the money-losing shrine. Terry Stewart, 52, is a former top executive of Marvel Comics. He’ll be the fifth director of the hall since it opened Sept. 1, 1995, at a cost of $97 million. Stewart, who starts Monday, wants to increase attendance by luring return visitors with concerts, commemorations and more memorabilia. But, he emphasized, “We don’t want to turn it into Disneyland or use theme restaurants.”