http://shoryuken.com/2016/03/10/killer-instinct-leaks-reveal-more-of-season-3-cast/
It sucks that this got out, but it happens to the best of them: Marvel vs. Capcom, Smash Bros., Street Fighter, and now Killer Instinct.
Mira
Mayas twin sister. She appears to be a vampire.
General RAAM
The main antagonist of Gears of War.
New Character Select Screen
Shadow Lords Mode
It sucks that this got out, but it happens to the best of them: Marvel vs. Capcom, Smash Bros., Street Fighter, and now Killer Instinct.
Mira
Mayas twin sister. She appears to be a vampire.
General RAAM
The main antagonist of Gears of War.
New Character Select Screen
Shadow Lords Mode