There’s a great movie lurking somewhere within the nagging clichés of “Death of a Superhero.” Adapted by Anthony McCarten from his 2008 novel, the film should be applauded for its strikingly morbid animation sequences, a winning lead performance from young up-and-comer Thomas Brodie-Sangster and an effectively solemn turn from the normally hilarious Irish comedienne Sharon Horgan. But with director Ian Fitzgibbon at the helm