Dynash of Doomhammer (EU) tipped us off to the Ulduar: Defiance trailer. This movie trailer is created by Atraira, who you might remember from the hilarious music video for Boombox and the epic cinematic version of Ashbringer: The Return of Tirion Fordring. Atraira has a flair for creating art from pre-existing game files, and he's used that talent toward highlighting the Ulduar raid instance.
Of course, this is a trailer, and not a movie in its own right. That means it's heir to all the usual trouble a trailer can have. It can be a little vague, and you're never quite sure if the subject of its preview is ever going to materialize. All that being said, though, I really loved Atraira's work here. The use of voice-overs from the game's files is well executed and appropriately dramatic. The sweeping score he used in the background is inspiring. The way he pieced together each scene is motivating. It really came together very well.
Atraira's made me want to grab my sword and go fight them critters in Ulduar. If Ulduar: Defiance is as good as the trailer, it'll be something we look forward to with each installment.