In reality (ironic since this is a action fantasy RPG), the ad has little new to offer. Still, it does a good job of reminding people that the game launches on May 15 (fans who haven't been paying attention or even pre-ordered are now, we believe, rushing to their PCs to order - Standard, Collector's).
"The Lord of Terror has begun his demonic crusade to shackle YouTube viewers into unholy slavery. Watch it now, and prepare for the end of days to begin on 05.15.12." Get yourself ready, Diablo fans.
Watch the ad below.