While TV is still struggling to tell superhero tales in a live-action format, animated comic-book-inspired stories continue to soar on the small screen. Perhaps it’s because the entertainment industry is faintly embarrassed by the idea of people in costumes. Hence, just about every superhero series these days features heroes who refuse to wear costumes (“Smallville,” “Heroes,” “No Ordinary Family”). Why? It’s like making a musical in which the actors refuse to sing.