Honestly, I don't think FNaF--and yeah, I still have trouble playing it ;__;--is the right fit for Del Toro. He's too old-world horror. This is very much new-world horror. Still, WB's doing stronger than some, and I'm sure the creator is enjoying some movie-rights money. :)
It could be a good halloween release.
It might end up putting Chuck E. Cheese out of business though. :)
Though I would expect that the Five Nights thing would become a bit of an artifact. I don't see the movie doing well if it sticks to that part. We tend to overlook the stupidity of going back night after night in a game, but I don't think it'll fly in a movie.