By stand a lone film, do you mean any film that doesn't have a sequel, or a film that stands alone in the sense that it didn't leave much of an opening for a sequel?
If it's the former, none, because there are enough sequels in the world already and most of the time they're terrible.
If it's the latter, none, because a true "stand alone" film shouldn't have a sequel, it would just ruin the point of it.
