Now prior to this Blizzard did state that they planned to release the Demon Hunter class before the 17th of August, and it looks like Blizzard will be keeping their word. According to an announcement on the World of Warcraft website, Blizzard revealed that the Demon Hunter class would be available to gamers on the 9th of August.
They also announced that the demon invasion would begin on the 9th of August. For those unfamiliar, the demon invasion is essentially a world event that will setup the story for Legion. Players can take part in the invasion with their characters and earn various kinds of loot when they participate.
Presumably this event will be only available until the release of Legion which is set for the 30th of August, so if you’re looking forward to checking it out, mark the 9th of August down on your calendars.