James Wan is no stranger to big challenges but his latest film, "Aquaman" may be his biggest yet. The result is an ambitious blend of sci-fi/fantasy, a classic superhero origin story, plus a healthy does of irreverent humor. Oh, it's also a crazy ginormous adventure. Not many filmmakers would rise to this challenge but Wan, the director of "Saw", "The Conjuring", and "The Fate of the Furious" is more than up to the task.