Alrighty, after thinking for a bit. I've decided what to make. An insectoid civilization that was on the fringes of the old empire. Now with the Empire gone, they seek to fill in the void the Empire left and become the dominant power in the Galaxy. I'm going for a mix of bio-weapons and natural species idea, in that there is a creator race(the main bugs) and their vat-grown servitors(the bio-weapon bugs).