As it’s only less than a week of the Blizzcon, people are hotly discussing what Blizzard is going to reveal. And they know that the next expansion for World of Warcraft will be unveiled then.
A user over at the MMO-Champion boards dug up a trademark registration attributed to Blizzard for Warlords of Darenor. The name was filed both in New Zealand and Australia, and the post also comments that warlordsofdraenor.com was registered a month ago (though, naturally, the site is currently barren).
Warlords of Draenor may be the next expansion for World of Warcraft