So, after taking a look at the map of Blizzcon I found it odd that World of Warcraft had such a large section of what I think will be playable computers. D3 has a section to play the expansion, heroes of the storm has a section likely to play a beta version of that game.
I'm thinking we'll get to play a starting zone of a new race/class like the year they let us play goblins/worgens.
What ever will be on those computers and what they announce on Friday I expect it will be HUGE. Then all the feelings of LFR will be overshadowed by what's next.