This beats the carp out of the Illidan trailer for the Burning Crusade.
http://www.worldofwarcraft.com/wrath/intro.xml
Narrated by Terenas Menethil (Arthas' father), it's a bit of a treat lorewise, and the lore was always what I loved about WoW, especially the Paladin lore.
Incidentally, I may be wrong about this, but I thought at the end of Frozen Throne, Arthas/The Lich King was fused with the Frozen Throne and couldn't actually move. The idea of him being in psychic contact with his legions while acting like a statue was kind of cool and gave him a lot of menace, while the new trailer makes him look too beatable and human.
Still not sure I'm going to bother with Wrath anyway, because I know it's just going to be more of the same old, same old with the instance grinds, lore being fucked over to make the game more accessible to casual players and no chance of me ever getting near the raids with all the good lore.