No, it’s not the next expansion to Warhammer Online, it looks like Games Workshop is expanding into the MOBA genre with their newest title Warhammer Online: Wrath of Heroes.
From the EA presentation today at Gamecom, it’s very similar to Warhammer Online’s scenario matches, except with more features. Wrath of Heroes will be Free2Play, allow for 6v6v6 matches and only feature pre-made heroes, which players can switch between mid-match.
Basically think of the WAR scenarios combines with a game like League of Leagends, and you get Warhammer Online: Wrath of Heroes.
Beta signups are already open and if you’re interested just head over the the WAR: WoH site. You can also see the official release trailer by continuing below which shows some gameplay.