A new trademark filing has surfaced by Blizzard in New Zealand and Australia. "Warlords of Draenor" drops hints at a new expansion or at least something Warcraft-themed. Filed on November 1st, we'll likely know more details when whatever Blizzard's working on is revealed during BlizzCon this weekend.
From Polygon's report on the story:
The trademark, which was filed on Nov. 1, covers "Computer game software, computer game discs, downloadable computer game software, computer game software downloadable from a global computer network, interactive multimedia computer game program; downloadable electronic game software for use on portable electronic devices such as mobile and cellular phones, laptops, handheld computers, and tablet PCs."
The usage listing also hints at connection to an online service: "Entertainment services, namely, providing on-line computer games; providing on-line non-downloadable computer games that may be accessed via a global computer network; providing online news and information in the field of computer games."
Additionally, the website WarlordsofDraenor.com was registered in October, though it currently remains empty and a WhoIs search reveals it was registered under domain company GoDaddy.
Keep your eyes on the site for news from BlizzCon as it happens this weekend.