Heroes of the Storm Teases A Tease

Over on the official Twitter, there's a new Heroes of the Storm teaser. Do you know what it could be? (we haven't a clue). My gut tells me that it's likely an event or new comic, simply because we have Mephisto, a Battleground rework and two new Hero reworks. Take a look below.  

pic.twitter.com/G7DqFiZIJO

— Heroes of the Storm (@BlizzHeroes) September 15, 2018