The new World of Warcraft: Cataclysm trailer had been released by Blizzard Entertainment. Follower of the World of Warcraft are given a sneak peek of what is set to take place in Cataclysm, its third expansion set:

"Having long plotted to reign supreme over Azeroth, Deathwing is poised to execute his infernal vision and reforge the world in flame."

"On December 7, players will experience the shocking consequences of his emergence from the Elemental Plane after tidal waves, earthquakes, and freak storms violently alter the face of Azeroth."

"This is how the Cataclysm begins, but the darkest days are yet to come. Deathwing's terrible wrath will soon engulf every corner of Azeroth, and the world... will never be the same."

Blizzard Entertainment previously announced that a new World of Warcraft: Cataclysm commercial will be debuting today. It will feature the cinematic footage from the highly-anticipated expansion of Warcraft.

"This Sunday (today in Australia) during the Dallas Cowboys versus Minnesota Vikings NFL game on Fox (starts at 4:15 PM EDT, 1:15 PM PDT), we are debuting a new television commercial for World of Warcraft's upcoming expansion," says Blizzard Entertainment on its Warcraft website.

The commercial will feature the first look at cinematic footage from Cataclysm. World of Warcraft: Cataclysm is the third expansion set for the massively multiplayer online role-playing game (MMORPG) World of Warcraft. It follows the last expansion Wrath of the Lich King. More than a year ago, The expansion was officially announced at BlizzCon. Earlier this month, Blizzard Entertainment officially announced the release date of December 7, 2010.

Here's the trailer for the World of Warcraft: Cataclym made available by Blizzard Entertainment on YouTube: