A new machinima cinematic was added in the Wrath of the Lich King Beta, the infamous “Wrath Gate Betrayal” event. You will see Arthas Menethil as the Lich King walking, the Horde and the Alliance fighting side-by-side, and the traitors told in the quest “Nothing but the Truth” is finally revealed.
Be WARNED, this is a HUGE SPOILER video.
(The quests and events after this story are more than enough of a reason for you to buy Wrath of the Lich King, today.)
Follow up:
So, if you haven’t done so, buy Wrath of the Lich King here or here. They ship Game Boxes around the world, especially in Asean-Oceania regions.