On Tuesday afternoon, the Hearthstone development team shared a blog post about what's coming in their auto-chess mode called Battlegrounds. Within the post, four new heroes (which were recently revealed via data miners) were confirmed and the four heroes they would be replacing were made public. Additional design decisions were brought to light as well.
On Tuesday evening, data miners revealed that inside Hearthstone's most recent patch (184.108.40.206393) were four upcoming heroes for the game's auto-chess game mode, Hearthstone Battlegrounds. While the information can change at any time with if new patch ships, the League of Explorers will become selectable characters when players first fire up a game of Battlegrounds. All of them except maybe their most famous member that is. The following custom art images are from Hearthstone Top Decks to visualize what players may experience.