Wow Kriston - we had the exact same death issue with DS7 when he was a preschooler. It was a period of time where he absolutely obsessed about it and it eventually just played itself out.

And I am infinitely glad we've never had any night terrors in this house (knock on wood). DS lately has had occassional nighmere's about whatever book he was reading right before bed. But he still loves creepy books.