Making good on a rumor from March, The Elder Scrolls Online has officially been confirmed. As suspected, the game takes place a millennium before The Elder Scrolls: Skyrim, and focuses on the daedric prince Molag Bal's attempts to pull Tamriel into the demonic realm.
The game is appearing as June's Game Informer cover story, so we should see more details, screenshots, and a teaser trailer soon. For now, the setting is about as far as our knowledge goes. The game is being developed by Zenimax Online Studios, and is due in 2013 for PC and Mac.
"We have been working hard to create an online world in which players will be able to experience the epic Elder Scrolls universe with their friends, something fans have long said they wanted," said game director Matt Firor in the announcement. "It will be extremely rewarding finally to unveil what we have been developing the last several years. The entire team is committed to creating the best MMO ever made - and one that is worthy of The Elder Scrolls franchise."