From Diablo Wiki
Gamescom is an annual video games exhibition held in Cologne, Germany. It's the largest of its kind in the world. Blizzard are attending this year where they are showcasing their upcoming card game Hearthstone but also the Playstation 3 version of Diablo 3. They have promised exciting news regarding Diablo 3 which is expected to be the announcement of the first Expansion, Reaper of Souls at 11:30 CET on Wednesday 21st August.