I basically agree with Chris on this one: this poster is very understated, and it manages to be creepy and effective exactly because of that. And something like this is probably the right way to sell a horror/thriller right now.
However, I can’t help but to compare it to the original Spanish posters, some of which I covered in this post and another one which you can see below. The Spanish posters are, if anything, even more subtle, especially because they avoid the kind of overt ghosts we have in the American poster. And I think they make a better use of color. The poster above is too toned down, the Spanish ones tend to “pop out” more. Not too much, but enough to make them more interesting to look at.