In these first days of August, Blizzard has announced they will reveal the next WoW expansion on Aug. 6 This is really important for Blizzard to do at this time, but it's hard to say if it's soon enough.
Typically, Blizzard reveals new WoW expansions at Blizzcon, but waiting another four months for a reveal would be a disaster for developers trying to avoid the 14-month stalemate we had with The Siege of Orgrimmar at the end of Mists of Pandaria. Moving up an announcement to next week
would be the bare minimum they would need to accelerate the next expansion's release.
But, does this accelerate the expansion enough?
We can only generalize about the history of past expansions, but Blizzard hasn't let 10 to 12 months passed between an announcement and the release of the new expansion. There's nothing saying they can't do better, and maybe they will this time. But,following this historical trend, we really wouldn't expect to see the new expansion before next summer.
And that's not much better than the last time. It also depends on fairly flawless execution by the blizzard developers.
So, I'm not saying that it will be a year before we get an expansion, just that the historical trends are not favoring us.
What's it going to be?