From the Prometheus IMDb FAQ:
It should be noted that AvP franchise is not considered part of the official canon of the Alien saga [...]
Prometheus is considered by both Ridley Scott and the film's producers to be the first film in the Alien series.
From an interview with Damon Lindelof:
[...] Look, as to what’s canon and what’s not canon, for me ...
Aliens don't have eyes. They sense their prey through changes in air pressure and noise. How they manage this with such accuracy isn't known, but a Predator's cloak bends light so that they appear camouflaged by their surroundings. When a Predator moves when cloaked they still emit changes in air pressure.
Aliens are also effective hunters underwater and ...
As Wikipedia says -
Prometheus was originally intended as a direct prequel to the 1979 science
fiction horror film Alien, set approximately 30 years before the
events depicted in the film. While the finished film explored a more
stand-alone mythology based upon the race of giant beings discovered
by the crew of the Nostromo in Alien, it is, as ...
AvP is not canon.
the promotional website Weyland Industries retconned the AvP movies from the canon by having Peter Weyland (Guy Pearce, pictured below) as the founder of Weyland Corp, as opposed to having AVP's Charles Bishop Weyland (Lance Henriksen) as the founder of Weyland Industries.
Ridley Scott also doesn't consider AvP a part of the ...
In films there is no mention of Female Predators (Yautja), but in extended canon there are female predators:
The subject of Yautja reproduction is not touched upon in
the slightest within the films, there are many members of the species
seen but none blatantly female by human standards.
Alien vs. Predator: Prey: ...
It's not a war. Predators hunt xeno because they like hunting. In the first issue of Aliens vs. Predator we can see that predators keep queen and then send her egg to different planets (chosen by predator) to create hunting ground.
Because of the constant change in settings between movies and comics we can only assume that Predators been hunting for ...
First of all, the main point to consider is that the Alien (and later Alien/Predator) universe is not an entirely pre-thought and consistently grown universe, with the stories well tied into each other. There were different producers, directors and story-tellers taking turns on the story and including additional stuff (like the merge with the Predator-...
Lindelof explains About the prometheus and AVP connection in an interview as:-
Q: You said nothing is an accidental reference, so is there a possible
intentional Alien Vs. Predator reference in that the Weylands are
always seeking eternal life?
Lindelof: You mean in terms of Charles Bishop Weyland? Look, as to what’s canon
and what’s not canon,...
Prometheus is intended to be the prequel to the Alien directed by Ridley Scott. Alien vs Predator was a spin-off franchise and has nothing to do with Alien or Prometheus time lines.
There is no relation what so ever between weyland characters in both movies.
The first three Predator movies reference Alien or AvP only in a sense that there is the Xenomorph skull in the trophy case in Predator 2.
However, the upcoming movie The Predator (released in September 2018) will reference at least some of the things in the AvP movies. In the trailer, there is a mask worn by one of the young blood Predators in AvP. What is ...