Heroes of the Storm (HotS News) - New Diablo Hero Teaser (Malthael ? Auriel?

A brand new Heroes of the Storm teaser was released, it would indicate another Diablo Hero.
Speculations include : Malthael | Auriel 

Link to the tease :
http://i.giphy.com/3o6gEfoiMZ9xdw4H5u...