Well. In some predator themed novels it was established the females were much larger and stronger than the males. In one novel a female accidentally broke a male's arm during mating.
Yeah, the Dark Horse EU writes them as basically klingons but focused around hunting rather than warfare.
One of the toys or something introduces an insectoid species called "amengi" (based on the discarded insectoid predator head concept, which the Prey helmet was apparently based on) who maintain their technology. The amengi originally enslaved the predators and performed genetic experiments to make them into pets and gladiators and stuff. Eventually the predators rebelled and enslaved the amengi, but lacked the cultural development that they would have achieved if they developed their tech and culture on their own. So they use their advanced technology to conduct ritualized hunts as part of their extreme honor culture.
Unfortunately, none of this stuff filters into the movies so don't expect any movies that expand on predator culture to reference it. I really don't understand why Disney doesn't mine the DH library like they do for Marvel. It's like the executives are idiots who don't know anything about their own IPs. You could easily churn out a few new movies or shows based on Gibson's Alien 3 and the Earth War trilogy if you're desperate to keep telling stories about Ripley and her associates. (Although the aging of the actors means that you'd need to use CGI to make them look young or even do the entire thing as CGI or 2D animation.) I personally think Ripley's fate should be retconned to "they escaped back to Earth and lived happily ever after", then focus on new characters and stories to make the universe feel bigger. Also, ditch the albino body builders and make the space jockeys back into actual aliens; they can still wear suits, but the creature underneath should look like a Giger monster.
I personally like the pitch about the cast trying to climb through a space elevator tower and then running into spider aliens.
At some point, you're going to have to give the aliens sapient members who can grow their own ships because relying on human stupidity to keep plots going has already gotten tiring under the DH EU. Also, hire an art director who actually gets the Giger aesthetic because the new alien designs always look like melted cheese crap.
Partly because the Disney Executives ARE idiots who don't know the IPs and partly because they probably don't own the rights or are cheap fucks who don't want to pay royalties.
We saw this same thing with Star Wars:
1.- Throw away all the EU
2.- Make shitty product
3.- Complain you don't have the source material like Marvel does
4.- Profit?
As for Marvel they have done the same to a limited extent in the movies and to a greater extent in the comics:
Drax has ALWAYS been a green behemoth created by Kronos (Arthur Douglas' family was killed by Thanos and Kronos uses Arthur's soul) to kill Thanos. Kinda dumb (sometimes) and with only one objective, relentless and is reborn eevery time Thanos is broguht to life by Death to be her champion.
Heimdall never was a black guy.
IMHO it's mainly the executives being cheap, imbecilic fucks. Plus their need to push
"The Message!"TM