We are the Borg. Lower your shields and surrender your ships. We will add your biological and technological distinctiveness to our own. Your culture will adapt to service us. Resistance is futile.
God I hope this happens someday to us. Except we are humans so we have already planned for this, and we can take out whatever adversarial alien civilization exists, however advanced they may be on paper. Even if it takes millennia we should be the dominant species in the galaxy and beyond.