That could just be Sinestra. Maybe.

No, Sinestra was Deathwing's consort and mostly was used to breed her own race of twlight dragons, her magic usage made her a purplish color with black tones, markings from her days as a member of the black dragonflight, she wouldn't have the elementium plating seen in the image because Deathwing only needed that to contain the amalgation of violent energy he had become after recovering in Deepholme.

I'll take your word for it over mine, I don't know much about the Cata expansion. I just think all the female Aspects have silly designs and wonder why anyone would draw DW with tiddies.