Hearthstone replica board found within World of Warcraft files
World of Warcraft's files have been trawled by dataminers, and they've only gone and uncovered a replica board for Blizzard's WoW-themed card battler Hearthstone: Heroes of Warcraft.
WoW Chakra found the files, as posted on the MMO Champion forum.
Here's the replica Hearthstone board as it appears in World of Warcraft:
And here's how it appears in Hearthstone:
While it seems unlikely that you'll be able to play Hearthstone in World of Warcraft directly, PCGamesN suggested that we may see NPCs playing it for fun. It's entirely possible.
Here's a video of the replica board from all angles. Skip past the Corgi if you hate dogs.