G'eve, Toothy! While I'm afraid that the Game Master Department doesn't oversee such projects, Drysc had something to say on the subject a while back:
Q u o t e:
We haven't yet begun planning a BlizzCon for this year, and truthfully it isn't intended as an annual event. We had a lot of fun though, and we're looking forward to getting another one going and inviting everyone to come hang out with us and check out everything that is Blizzard.
I hope this has proven illustrative. If you have any other questions, please let us know, and we'll see what we can do for you. :)
Look on my works, ye mighty, and despair...