Wrath Spoilers!!! Highlight to read:

Well there's finally video up for that battle that everyone was guessing would be a world event. Now it seems that it's a quest chain that you start in Northrend! i'm not exactly sure how this is going to work, but it's sort of a Caverns of Time thing only it involves Alexstrasza the Life-Binder and you don't go to the CoT at all. What i find very surprising is that players won't receive the quest until you've been in Northrend for a while; in fact, the player who made these videos was a lvl 80 pally.

Note: Probably this quest makes you Revered with the Warsong Offensive... To access this quest it seems you must have done all quests from Alexstrasza in Dragonblight and all quests in Agmar’s Hammer.

So this is a quest chain that seems epic enough to give you a title lol. There are a lot of Forsaken Refugees streaming into Org, all the vendors are complaining, and the Lady Sylvanas (in her old High Elf body) is in Thrall's chambers when Lady Proudmoore shows up to hold a council because the King is readying to go to war. Sylvanas makes it clear that she has been betrayed by Varimathras, so Proudmoore leaves to try to talk some sense into King Wrynn and we go to UC to try to take it back.

This part of the chain requires a party of two (you don't need a party of five when you have 2 leet dpsers). Varimathras takes off (the coward), you're surrounded by waves of undead trash, and lastly a giant Abomination boss comes out. Thrall seems to be tanking while you are dpsing. Sylvanas sings her lament then joins in the battle (using her uber bow and also dual wielding swords that glow red). You go into the UC and battle some more, face another boss (this time a huge dread lord), and then of course face the ultimate boss, Verimathras himself, who's been hiding in the Royal Quarter and calling in reinforcements.

This is vastly different then what i was expecting because there was some talk of the razing of Org! Also, where is Slyvanas challenging the Lich King by unleashing a new plague? Maybe that is the world event instead of this?

Video can be found at Spponcraft.com:
part 1 part 2 part 3 part 4 part 5 part 6