Ah, Star Control. :-)
I could find comfort in being conquered by the Sireen race.
It'd just be plain-out embarrassing to be conquered by the Trade Federation. If I didn't die from defending, I think I'd have to commit lightsaber seppuku just to exhonorate the shame of losing to such a spineless race.
Imagine the raw chaos and fear that would result from a joint strike against us from both the Klingons and the Predators, however. There would be no surviving it.
For that matter, imagine the Klingons fighting the Predators. Not the sissified new Klingons, but the Klingons from the 80's. Star Trek III Klingons, minus the Christopher Lloyd overtones... just cutthroat and sinister. Space pirate Klingons. Who would win?