The new Hearthstone expansion has just been announced at BlizzCon 2019. It will be available on December 10, probably about 10 a.m PST / 1 p.m EST, and it will be the last extension of the Year of the Dragon.
Until the release of the expansion, players can pre-purchase packs of Dragon Takeoff cards in two forms: the 60-pack includes a legendary golden Dragon Takeoff card and the Fracture Back card, while the 100-pack includes these bonuses and the new Deathwing Warrior Hero. These packs are available for €49.99 and €79.99, up to one pack of each type per account.