Bioware and EA have announced
a new free-to-play game set in the Warhammer universe to be released later this year for the PC - Warhammer Online: Wrath of Heroes, based on Age of Reckoning:
Warhammer Online: Wrath of Heroes will advance online action games by delivering instant, fast-paced, and competitive PvP arena gameplay – for free! In this thrilling game, players form three teams and will dive into epic 18-player battles using a variety of characters and iconic Warhammer Online heroes, settings, and weapons. The course of conflict can quickly turn against you as players switch from one hero to another mid-battle, and alliances between the teams are forged – and broken.
An official site
is online as well and we've got some more information and screenshots on our game page
A trailer accompanies the release; watch it below or in HD