That trailer was really well made too, I think. Both the animation/art and the audio of it were awesome. Opening with the First Necromancer playing the organ instantly brought to mind the skeletal hands playing music in Lumbridge church! I still remember stumbling upon that when I first started playing as a kid. Death's voice was awesome too, I hope we'll get to hear it narrating some cutscenes or such in-game.
I'll need to hurry up with my questing to get caught up in story before this release, as it's closer than I thought! (not that I'm complaining)