Blizzard will host a press conference at Germany's Gamescom on August 21.
The company confirmed in an invite to Destructoid that the event will take place from 11:30am CET (10:30am UK, 2:30am Pacific), but offered no further specifics. The invite only teased that the event is "sure to capture the attention of the Heavens, Burning Hells and all the shadowed places that lie between", which could possibly relate to Diablo 3, which is due for release on consoles just over a week after the event.
Blizzard has confirmed a Diablo 3 release date of September 3 on PS3 and Xbox 360. Customers who pre-order will receive an exclusive in-game item, the Infernal Helm, which grants an experience point boost to any character who wears it.
The game is also in development for PS4 which is out later this year, but the developer has said it will not be a PS4 launch title. The next-gen version will use the touchpad on the new DualShock 4 controller to make UI and inventory navigation more intuitive.
You can check out a Diablo 3 PS3 gameplay video here.