During EVO 2016, right before grand finals, Microsoft and Iron Galaxy revealed that Killer Instinct will be having Eyedol, the final boss from the 1994 KI title returning to the new Killer Instinct. Eyedol will be the final character from season 3 and will be released on July 22 for Ultra Edition owners. Combo Breaker edition owners will get Eyedol a week later unfortunately.
Killer Instinct is available on Xbox One and Windows 10, along with the Definitive Edition releasing September 20.
Be sure to check out the Eyedol trailer below