GC is a kind of European E3/PAX that is located in Leipzig, Germany. It is a trade fair for the Video Game Industry as well as a hands-on exhibition for the game playing public. All of the major players will be there including Microsoft, EA, Nintendo, etc.
Today (August 22) at 10:30am Leipzig time, the day before the Games Conference opens to the general public, Blizzard is holding a press conference. The topic? "Presentation / Demo new games". Are they going to be giving new info about StarCraft II and Wrath of the Lich King? Probably. Are they going to finally announce the project that their third development team is working on? There is a lot of speculation that yes they are and it is Diablo III.
Right now, Diablo.com redirects to the Blizzard.com home page. Diablo3.eu was getting a forbidden error but is now directing to the UK Diablo II expansion site. Worldofwarcraft.com/wrath also was showing a forbidden error up to being announced at BlizzCon.
I'm pretty excited at the prospect as that was my biggest disappointment at BlizzCon. Do you think they will announce a new game at GC? If so, what do you think it will be? Or am I just being unrealistically optimistic yet again? I guess we'll find out soon.
Update: So far, nothing new has been announced at GC.