It's all official. I'll post details as I find them. Going to copy and paste some stuff from shacknews:
11:26: Mentions Wrath of the Lich King. A few discernible boos. "Arthas has set events in motion that could threaten all life in Azeroth. As soon as you set foot in Northrend, you're going to be interacting with Arthas in one form or another. It's gonna be really cool. Now Arthas is no chump, so we'll be raising the level cap to 80."
11:27: PVP features: New arenas, new battlegrounds, siege weapons, destructible buildings. New profession called Inscription. Permanently enhances player spells and abilities. The crowd oohs and ahhs at that.
11:28: Northrend plans: New zones, 5 man dungeons, 10 man raids, 25 man raids, hundreds of new quests, monsters, and items. "That stuff's all good, but even more exciting, for the first time in World of Warcraft, we're introducing the Death Knight hero class."
11:29: Showing video. Northrend looks rocky. Paladins looking up to the sky, dragon fies overhead. "It's begun. You all realize, I was once like you." Forests that are burning constantly. Some cool flame effects in dungeons, skull with fire pouring out. "The land itself can rise up against you. Long forgotten terrors will smother your courage." Giant snow creature attacks player.
11:30: "All that awaits you is death." Death Knight--paladin transforms into Death Knight, surrounded by enemies, kicks ass with black/purple magic. Ballista fires a giant projectile in siege combat. "For in the final hour, all must serve the one true King." Arthas shown briefly, glowing and stuff.
