Well, if the Force Hound isn't the black armoured guy with a lightsaber, he might be the Mr Blond Redbeard in the picture. (Although... How literally should we take Sith in this case? What if it's a cultural or bloodline thing in this context, and Mr Blond Redbeard is the Sith? After 10 000 years and possible non-natural interbreeding, Sith features might have vanished utterly.) The Dathomiri is more than a bit troubling, though.