Lok'tar Ogar - Victory or Death! ... Or maybe we could settle this over a game of cards?
So Blizzard's big PAX East surprise was
Titan Starcraft III Warcraft IV World of Warcraft: It's totally the Burning Legion again Hearthstone: Heroes of Warcraft, an online CCG in the vein of Magic the Gathering. It actually looks pretty neat - even sort of Duels of the Planeswalker-y in its layout, but in the more Cartoon-ish Warcraft style. You can play as one of 9 heroes that fit the archetype of a Warcraft class (Garrosh Hellscream is the Warrior, Jaina Proudmoore the Mage, Thrall the Shaman, etc.) and build your own decks filled with spells, minions and what have you, to do battle either against AI Warcraft Heroes and Villains - such as Gul'dan and Uther Lightbringer - or against opponents in 1v1 Matches across Battle.net.
You can check out a dev diary/preview below, and sign up for the Beta at Hearthstone's Battle.net page. Hearthstone should be out this year - "Not Blizzard soon, but IRL soon", according to Rob Pardo - on PC and Mac, with an iPad version coming later.