Alien/ Predator/ Blade Runner Shared universe (in order of timeline)

[NOTE: adapted from a reddit thread I read; other fan ideas incorporated along with my own]

*Alien/Predator*
Firstly, let me establish that Prometheus and Alien: Covenant do not retcon Alien vs Predator. In Prometheus, a mural in the Juggernaut (the Engineer space craft) show that Xenomorphs exist prior to Prometheus. David seems to have attempted to replicate the Xenomorph with his... bio-morph? Something more organic than the true Xenomorph. Further more, in the novelization and early drafts of the script, the Xenomorph species was created by the Engineers, and David's Xenomorph variant was created in an attempt to replicate them.

Peter Weyland may be a distant cousin of Charles Bishop Weyland and acquired ownership of Weyland Industries, reshaping it and "founding" the new Weyland Corporation in 2012. Peter Weyland's acquisition of Weyland Industries would afford him knowledge of the Antarctic expedition of 2004, spurring on his research while keeping the Bouvetøya Island incident classified.

The events of Alien vs Predator are referenced in The Predator, where a collection of weapons also includes a spear used by the lone human survivor of Alien vs. Predator.

*Blade Runner*
Now that that's out of the way, Ridley Scott said this in relation to Blade Runner and Alien: “So... Almost this world could easily be the city (Los Angeles "The City of Angels") that supports, the crew that go out in Alien. In other words, the crew of Alien comes back in, they may go into this place and go into a bar on a street near where Deckard lives.That's how I thought about it.”

This is further supported by shared props. In Alien when Ellen Ripley prepares to fire up her escape lifeboat from the Nostromo, she revs the engines by commencing to "Purge" them. The screen that appears on her monitor is the same "Purge" screen that appears when Gaff fires up the thrusters for his flying police cruiser near the beginning of Blade Runner.

In the 20th Anniversary Alien DVD, an extra titled "Nostromo Dossier" contains a throwaway mention that at some point Dallas took a paycheck from Tyrell Corporation.

The bonus material on the steelbook edition of Prometheus implies that Peter Weyland’s mentor was Eldon Tyrell, the man who created the replicants in Blade Runner, and whose office is at the top of a pyramid, and whose creations literally "blew up in the old man’s face."

Additionally, Predator: Concrete Jungle fits in well with the Blade Runner future, intentionally or not.

*Soldier*
An often forgotten film known as Soldier is said to co-exist with Blade Runner. Writer David Peoples considers the film to be a "spin-off side-quel" to Blade Runner and contains a handful of references to it.

One of the battle names tattooed on Todd's arm, Tannhauser Gate, is from the speech Rutger Hauer recites near the end of the movie Blade Runner. Todd's service record, displayed on a computer screen, includes the battles of Tannhauser Gate and Shoulder of Orion. In one of the dialogues of Soldier it is mentioned that there was a war at Tannhauser Gate.

It's implied in the film is that the genetically-engineered soldiers meant to replace Todd and his fellow soldiers are replicants. The short film 2036: Nexus Dawn, set in between the original Blade Runner and Blade Runner 2049, implies that Nexus-9 replicants were developed in 2035, the year before Soldier takes place, seemingly confirming that Soldier is canon, or at least coincidentally lining up with the film.

The USMC smartgun and M14A pulse ride from Aliens is on Todd’s weapon training record.

Taking this into account, we now have 20 films, and discounting the comics and novels for time and simplicity's sake, a timeline. For some reason, it's been hammered on the head that The Predator is before Predators despite having no relation to each other other than Predators and existing in the same universe. I guess I'll just put it between November 2018 and November 2019?