After a couple of weeks filled with rumors and leaks Blizzard has now officially announced Hearthstone's next expansion - Journey to Un'Goro. It will bring with it 135 new minions and spells, 2 Legendary cards for each class, as well as two new mechanics: Quest and Adapt. The new Adapt keyword allows a minion to discover an enhancement when its played, essentially giving it things like Taunt, Divine Shield, etc. Quests on the other hand are Legendary cards that always appear in your hand at the beginning of the game, and if you manage to complete their rather hefty requirements you will instantly be rewarded with an incredibly powerful card - as shown below.
If you're interested in learning more, ideally from two men wearing flannel shirts, allow me to show you the recently posted announcement video. It features the newly released trailer for Journey to Un'Goro, as well as a brief overview of the new mechanics with Game Director Ben Brode and Production Director Jason Chayes. Have a look:
Journey to Un'Goro will be coming to Hearthstone in early April, but if you are so inclined you can pre-order 50 Journey to Un'Goro card packs right now for $50 and receive the Fossil Card Pack. I would personally recommend you wait, at least until more cards get revealed. Speaking of which, Blizzard has stated that they will be releasing more information about the Journey to Un'Goro and its cards starting from March 17th.
If you would like to learn more, or just keep up with the reveals moving forward, you should head over to the official website. Right now its pretty damn bare-bones, but it should start filling out in the near future. Until then, here's a brief teaser in the shape of some recently revealed cards: