I was just at the Legacy of the Void launch event at the Coex in Seoul. There was one developer on hand who took questions from the crowd and tried to answer them without giving away any spoilers. There were also a few show matches between popular players, and a wedding for a former Broodwar pro player; it was quite the event.
Even though other genres are a lot more popular than RTS is now, the packed venue makes me optimistic about the future of the Starcraft franchise.