Originally Posted by
shoc
And the 'days between announcement and release' statistics are pointless now because they are in a completely different development cycle of two different teams developing two different expansion simultaneously. In the past, with only 1 development team they would have only been able to really start the development of the next expansion when the previous expansion was shipped, and even then you would have to continue developing the 2nd, 3rd tier before really committing to the next expansion. That's why there were those brutal content droughts after Sunwell, ICC, Dragon Soul, and SoO.
But this time is different, because the X6 team has been working on X6 since MoP, so who knows how far along they are. Considering that the WoD team have probably all started development on X7 the moment they launched 6.2, I think we might be seeing this expansion sooner than we think.
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Assuming around a March-ish release date (if Blizzard IS really serious about making sure the last tier doesn't last any longer than the first), then they could announce X7 at Blizzcon 7 months later in November, and release the expansion 6 months later the following March. It kind of sets a comfortable precedent where Blizzard could announce an expansion at every Blizzcon, start a Beta in like December, and launch with a comfortably long beta.