Turbine's official Dungeons & Dragons Online website has been updated with a fourth monster profile, this time detailing the Worg. Once again, concept art of the beast is included, but you'll need to be a member of the game's forums to view the article. Here's a taste:
In battle, worgs attack much as wolves do frequently in large numbers, relying on their ability to trip foes and then deal mortal blows when the foe is on the ground. Worgs have an uncanny knack for sneaking up on their enemies in darkness, often stalking their prey for some distance before attacking. In addition to coordinating their attacks among their own kind, worgs frequently appear with goblins and hobgoblins, though in truth a battle between a typical worg vs. a typical goblin fight would result in a healthy feast for worgs. Alongside more powerful creatures such as hill giants, worgs serve more willingly as scouts and pets.