*Aliens vs Predator: Requiem* showed us what a Xenomorph would look like after gestating inside of a Predator:

!["Predalien" from AvP:R, showing Yautja dreadlocks/quills, much lighter body pigmentation on the underside of the body (similar to predators), as well as predator-like mandibles.][1]

[more images][2]


  [1]: https://i.sstatic.net/TC885.jpg
  [2]: https://www.google.com.au/search?q=avp%20requiem%20predalien&hl=en&tbo=d&source=lnms&tbm=isch&sa=X&ei=ggj1UJu5GMKhigeK-IFY&ved=0CAcQ_AUoAA&biw=1920&bih=1063