It all seemed pretty reasonable, and along the lines of my own suspicions. I don't think it's that close though.
I think the WoD release date is probably really close to correct.
But they said AT blizzcon this year that they would have one next year, doesn't mean they couldn't cancel it, but I think people underestimate how much time and energy goes into Blizzcon, if it's getting canceled they know already, because if it's not at least the pre planning has already started.
I also don't see HotS being delayed til 2015 as we knew about it long before we knew about Hearthstone, and while they are very different games in terms of development requirements, we're talking like a full year before Hearthstone, so it's likely really close to at least a closed beta already. Knowing Blizzard though Beta will last a long time.
The rest I don't particularly care that much about though.