A new Hearthstone expansion Journey to Un’Goro comes out on April 6th. You can get more details about it from the link here.
The announcement by Blizzard
The most momentous scientific expedition in Hearthstone history is about to commence: the Journey to Un’Goro begins on April 6! Un’Goro Crater is a wondrous—yet dangerous—locale brimming with voracious vegetation, powerful elementals, gigantic primordial dinosaurs, and ancient mysteries waiting to be unraveled. You’ve been selected to join the expedition, and there’s still a little time left to prepare for the trip!