Chet existed before the movie, in the EU. I hate the design (sorry Predxeno) but understand the lead in from the first AVP which was also taken from the comics.
A:R was too far of a stretch. Ripley died in A3, we had closure. Ripley cloning is bad enough but pile on Alien DNA? Too much. I did appreciate how the made Call, alphabetically correct and advanced. I can't wrap my head around Newborn
As flawed as AVP:R is, we still get some consistancy and a lot of "Predator action" always good.