When we talk about great horror auteurs, James Wan is most certainly one of the most fascinating creatives on the list. The filmmaker has helped spawn three separate horror movie franchises ("Saw," "Insidious," "The Conjuring"), in addition to helming big-budget studio pictures like "Furious 7" and the superhero flicks "Aquaman" and the upcoming "Aquaman and the Lost Kingdom." And yet, despite his massive financial success in the realm of more mainstream cinema, Wan keeps coming back to...