At BlizzCon 2017, Blizzard announced World of Warcraft Classic. This is the vanilla version of World of Warcraft. What this means is, fans will be able to play World of Warcraft as it originally released, prior to its many updates and gameplay changes. There have been several third-party vanilla servers in the past that Blizzard has shut down and World of Warcraft Classic appears to be the company’s way of catering to its many fans who want an old school experience.
No release date or timeline has been given for World of Warcraft Classic other than Blizzard saying it’s being worked on.
Also, Blizzard announced Battle of Azeroth a new expansion to World of Warcraft, which leaked prior via a New Zealand patent filing.
"Conflict is at the heart of the Warcraft saga, and in Battle for Azeroth, tensions that have been simmering for a long time escalate into all-out war,” said Mike Morhaime, CEO and co-founder of Blizzard Entertainment said in a prepared statement. “World of Warcraft players are incredibly passionate about the characters and factions they identify with in the game, and this expansion will make them prouder than ever to declare their allegiance to the Horde or to the Alliance."
Disclosure: Blizzard sponsored the correspondent's flights and hotel for BlizzCon 2017.