see full list here). The movie contains 83,871 deaths, including the 80,000 Nova pilots at the end. That's an astounding 693 deaths per minute! Even if you removed the 80,000; the movie would sit second on the list.
It is also interesting to note that four of the top five body counts are PG-13 movies. This could lead to an interesting discussion if number of deaths should be included in movie ratings, not just how the death happens.
A quick eye-test also suggests there are more deaths in recent movies than older movies. But I can't say definitively.