The dev team is several “wild” events that are scheduled to start on February 19th. Players can fight in a special arena that deals only with cards that are exclusive to the wild format, after which they can duke it out in the Wild Tavern Brawl or the Wild Brawliseum.
Looking ahead to next month, on March 1st Hearthstone will make some big changes to its ranked play. The gist here is that all future resets will knock players down only four ranks below where they were instead of hinging on stars. Also, the only way that the monthly card can be earned is by winning five games in ranked standard or wild.
Source: Hearthstone, press release