Do all those who died return to life at the end?
I find the ending kind of ambiguous to the question did all the people of Pitchford Cove who died or were turned into supernatural creatures return to their normal selves at the end of the movie. The ending kind of hints that everything returned to how things were when Phil gets out of his car after completing the ritual and sees that his car's convertible top and the dent on the side has returned to perfect condition again.
I like the more downbeat idea that they're still dead. Having everyone return to life at the end is a fairytale's cliche.