Teaser trailer at most.
WoW xpac announcement and HS open beta/release date announce will have to carry this blizzcon.
We know whats happening with D3, we know whats happening with SC2 if im not mistaken (not a genre i really follow) so besides anything completely brand spanking new that no-one knows about i wouldnt expect more.
They pulled people away from Titan to redirect the design goals earlier this year so i highly doubt they will show anything even remotely gameplay/universe related.
They should offer a free video stream to the players that have a active subscription to the game.
Will you stop?... You get IN-GAME ITEMS... You get to watch an EXCLUSIVE STREAM... I have loved to watch every Virtual Blizzcon so far and this one won't be any different, it's worth every penny even if I have already spent THOUSANDS of Euros on their games. HAVE MY MONEY, BLIZZARD! *Throws money at my monitor*
you can watch the first main stage attraction (aka next expansion reveal) without buying the ticket, right?
you can also wait 10mins and find all the infor gathered for you on mmo-champion or youtube ;-)
Trust me, for many like me it's NOT the same. We want to see it LIVE we want the FULL interviews and we want to run into the game and tell all our friends about all the cool stuff before they know it.
It's a feeling you only get during Blizzcon and... it's just great, Blizzard is like no other gaming company to me and I know that I sound like the greatest fanboy of them all but World of Warcraft... shaped... A large part of my life basically... I can thank it for my advanced English and many other things.
I shouldn't be saying this, but there'll be free streams abound of Blizzcon anyway. You just buy the ticket for the in-game stuff.
Not the only reason really. I did that the first time around, and the general feeling was quite meh, because the overall quality was rather bad, the stream connection wasn't all that great and you couldn't move around as freely as to what to watch. The year after I tried purchasing a virtual ticket and had a much better experience, the quality was a lot better, I never had any connection issues, and I had complete control of what to watch and when.
Maybe the streams have gotten better since then, and it works better now, but I really don't trust it, especially not if it's on twitch.
The in-game stuff is a nice addition to it all though.