Heart of the Swarm, the first expansion for PC real-time strategy game StarCraft 2, will be available from March 12, 2013.
That's according to information posted and later removed from the StarCraft 2 page of Blizzard's Battle.net service, which says that both the original game and the expansion will be available for £44.99.
It goes on to detail a Digital Deluxe edition also containing three StarCraft 2 Swarm-themed Battle.net portraits, a World of Warcraft Baneling pet, a StarCraft 2 Zerg Ultralisk "Torrasque" skin, plus a Blade Wings item and Zerg banner sigil for Diablo 3.
While the information is no longer live on Battle.net, Eurogamer Spain reports that Blizzard is expected to make an official Heart of the Swarm release date announcement later today.
Earlier this month Blizzard released details on Heart of the Swarm's clan system.