Blizzard reveals the promised new World of Warcraft expansion, announcing World of Warcraft: Legion, a new add-on coming to the MMORPG. They don't say when this will launch, but direct interested players to the WoW website to sign up to beta test this "later this year." The add-on will add a new Demon Hunter hero class, artifact weapons, a new zone, and a 110 level cap, along with the ability to instantly boost one character to level 100. Here's more:

World of Warcraft: Legion ushers in an era of unprecedented conflict for the Alliance and the Horde as the Burning Legion’s crusade against creation enters a terrifying new stage. The expansion is loaded with features and content that will transform players into Azeroth’s elite vanguard against the shadow, including:

• New Hero Class: Demon Hunter—Unleash the demon within as an all-new melee hero class gifted with preternatural mobility—and the ability to metamorphose into hellish new forms.
• New Feature: Artifact Weapons—Smite the Legion with legendary weapons of lore. Earn Artifact power to unlock abilities and traits, and customize your weapon to suit your needs.
• New Continent: The Broken Isles—Discover the fate of a lost night elf civilization, confront twisted fragments of the Emerald Nightmare, and hunt agents of the Legion in all-new zones.
• New Feature: Order Hall—Whether you’re paladin or warlock, unite fellow NPC members of your class’s order to carry out missions at your command.
• New PvP Honor System—Fight for fame, glory, and a range of new PvP-specific powers as you face the opposing faction in Arenas and Battlegrounds.
• Boost to Level 100—Come fully prepared to battle the Legion with a level-100 character boost, and fight alongside your friends in this epic new chapter of World of Warcraft.

“In World of Warcraft: Legion, the stakes for the Alliance and the Horde are higher than ever, so we’re putting some of Azeroth’s deadliest forces directly in players’ hands,” said Mike Morhaime, CEO and cofounder of Blizzard Entertainment. “Whether they’re wreaking havoc as a Demon Hunter or unlocking awesome new abilities for their Artifact, players will develop their characters’ power in ways they never have before.”