I think all 4 of the original pic were worthy of being turned into a complete set.
The heart looking one even. It might be built up around some organic, diplomatic, sickeningly peace-corp race that the war-mongers would simply love to stumble across.
Maybe as one of the single-system AIs. After all, we have SO MANY available now but there are still some extreme variants we can fill in so everything doesnt feel the same. Hmmm a cuddly-bunny race whose survival is based on high-population, high spread, and colonizing nearly everything.
Can they fire colored eggs at us?
(j/k)