Shortly after the BlizzCon opening ceremony on November 2 (on or around 1pm PDT), players will be able to download the same in-development BlizzCon WoW Classic Demo that will be playable on the show floor. Players will have a chance to explore and enjoy a limited questing experience through a pair of classic early-level zones—one Horde and one Alliance—and experience firsthand our recreation of the original Azeroth.
Once the demo is live, you’ll be able to play until 10am PST on November 8, giving BlizzCon attendees a chance to check it out again once they get back home.
Not much more info than that, but it should be curious to see what those crazy people are up to. I have a feeling that these zones are going to be packed for this, even if you do have to pay to get it. If they don't have the current shared-tagging of enemies systems, it'll be fun to see how long it takes to get your Kobold candles in Elywnn Forest.