A new game mode for Hearthstone has been teased by Blizzard via the game's official Twitter account.
The brief video, reproduced below, shows a transition of the main menu screen to include a new option alongside the traditional Play, Solo Adventures and Arena tabs.
Given its appearance alongside Hearthstone's existing core game modes, the video suggests that an entirely new way of playing the game is on its way. Co-op Adventures? Bespoke Tournaments? Team PVP encounters?
Blizzard recently announced that new cosmetic Hero options would come to Hearthstone in the near future, but the game's main interface seems an unlikely place to highlight the feature, and would more logically be selected alongside the options to change card backs.
We'll update this post as soon as we hear any further announcements.