Through their official Twiter, Blizzard has mentioned what could be the 27th Overwatch hero.
Kaplan said: "Ok. Incoming. Brace for it..".
After that, in an "After Action Report" called "Operation White Dome", we can read a referring to a certain Emre Sarioglu, presumed a member of the Incursion team.
And now Overwatch fans are already speculating on the identity of the new hero, and whether or not it's Emre Sarioglu.