Best Blizzcon for me was the Overwatch Announcement during Opening Ceremonies. I don’t even play that kind of game, but the cinematics, trailers, raw emotion from the OW team revealing it to the world. I was in awe and seriously had chills. The whole audience had no idea to expect it was just as rapt as I was. It was just a very thrilling time to be sitting there.
I am not getting on any hype trains right now. Last year they did not have much to talk about. This year, hopefully they do. It does not mean whatever the HS dev is referring to is Diablo related though.