Warcraft has always been a franchise that's had a quirky sense of humor at its heart, and we haven't seen that humor in recent trailers. Given the themes of the prior two expansions, that was understandable -- how can you make light of the Lich King? How can you make a joke about Deathwing literally ripping the world apart? These were dire times, and they required a suitably dire cinematic to get the urgency of that point across.
Mists of Pandaria is an entirely different sort of expansion, and the cinematic reflects that. But there's far more to this cinematic than meets the eye -- and it's the deeper meanings that continue to delight me.