Has anyone else spotted this similarity?
Bad guys in DA: Drengin. They enslave everyone. However a subspecies, the Korath, has now arisen to prefers exterminating everyone to enslaving them.
Rewind fifteen years: Bad guys in Starcon 2: Ur-Quan. They enslave everyone. Subspecies: Kor-Ah, who -- you guessed it -- prefer extermination. The Kor-Ah even had a dark grey sphere of control on the map, and their ships were black.
Not to mention the whole impenetrable planetary shield thing (in GC2 -- a protection shield erected by humans; in SC2 -- a "slave shield" erected by Ur-Quan).
J.