It's not a woman. Did you really think it would be? Changing a hero's race or gender is usually seen as positive/progressive, but doing that for an evil villain risks charges of negative stereotyping. Such is the game.
It's Toby Kebbell, who you may remember as...er...that guy who isn't Perseus in Wrath of the Titans, and the dude who's not Jake Gyllenhaal in Prince of Persia. He's also Koba the gorilla in the new Planet of the Apes prequel-sequel, which strikes me as a positive sign, in that he has experience playing a role where his real face is never seen, and physicality must convey emotion.