Nothing else to say
It seems that director James Wan is indeed who one should go to if you want to make a horror movie.
Admittedly, this is a director that, although talented, is not one I am familiar with. I have only seen three of his previous films (two of which, Mortal Kombat and The Conjuring: The Devil Made Me do it, came out earlier this year), but am able to recognize his influence on 21st century horror films, thanks to movies like Saw (2004), Insidious (2010), and Insidious: Chapter 2 (2013).
For the most part, the casting choices in the DCU films have been good (even Ben Affleck as Batman was not a total loss). That is still the case for Jason Mamoa as Aquaman, which is really the only true positive thing to say about the movie. He does make a splash, but the script is down right soggy.
The film does open with an origin story (which is fair, since it is not as well-known as those of Batman or Superman). We see how Tom Curry (Temuera Morrison), a lighthouse worker, finds a wounded woman named Atlanna (Nicole Kidman) on the shores. He heals her, they fall in love, and have Arthur. Eventually, Atlanna must return to Atlantis to stop the onslaught on Tom and Arthur after having run away from her marriage to King Nereus (Dolph Lundgren).
Nothing else to say