New Hearthstone Expansion Announced

During its BlizzCon 2016 keynote this morning, Blizzard announced a new Hearthstone: Heroes of Warcraft expansion.
Called Mean Streets of Gadgetzan, the expansion is themed around the bustling port town of Gadgetzan. In keeping with the theme, it features three city factions: The Grimy Goons for Hunters, Paladins, and Warriors, the Kabal for Mages, Priests, and Warlocks, and the Jade Lotus for Druids, Rogues, and Shamans.
Most notable in this new expansion is the introduction of tri-class cards,