|Oct ??||Patch 6.0 released. No formal release date yet, but it's usually about a month before the expansion proper.|
|Nov 13||Warlords of Draenor released.|
|Nov 21 - Jan 6||WoW's 10th Anniversary. Remastered Molten Core (for level 100) and Southshore vs Tarren Mill (for level 90-100).|
|Dec 2||Rated PvP season starts.|
|Dec 2||Normal and Heroic Highmaul raid opens.|
|Dec 9||Raid Finder and Mythic Highmaul opens.|
I'm really happy that raids are not being opened right away. At least there will be a few weeks so people can take their time levelling.
It seems like a short time between the start of the expac and the 10th Annversary. However, you only have to do the content once to get all the rewards, so that should make it a lot easier. As well, Blizzard does have data on how fast people normally level.
Still, the holiday season occurs at the same time. I expect that Blizzard to be monitoring what percentage of the playerbase has done the anniversary content. My guess is that they will extend the availability of the content to the end of January.