It’s not a sequel, expansion, or that rumored next-gen MMO
They wouldn't unveil something THAT big at PAX, they'd wait until Blizzcon to showcase their newest, highly anticipated IP.
As much as I'd like to see Blizzard All Stars, they've been advertising the same positions for the team for over a year now. Any recent developments would have been undertaken by the SC2 team and they've had their hands full with HOTS, so I dunno. Curious.
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