Here's what's in store.
There are some significant class changes that will come into effect as soon as the patch goes live and you can take a look at these in more detail over on the class preview blog.
As well as the transmogrification update, players will also be able to queue up for dungeons, raids, Battlegrounds, or Arenas as one class while continuing to play as another while they wait.
Between the pre-expansion patch dropping and the release of Legion, Burning Legion Invasions, The Battle on the Broken Shore, and Demon Hunter early access will be unlocked. Firm dates have yet to be confirmed, but players that pre-purchase Legion can look forward to the second or third week of August (no later than August 17 worldwide) to start playing as Demon Hunters.
The pre-expansion patch releases on Wednesday July 20, and Legion drops on August 30.