
For those of you who still think BR and ALIEN share the same universe, here's the once-official timeline from Prometheus.
Go read it, see if you can merge it seamlessly with the official BR timeline.
And this is just one example. There's a lot of evidence out there proving the two franchises, owned by two rival IP holders (studios) aren't sharing their universes canonically. And it will remain so until their IP holders don't officially announce the contrary.
Sure, you can have your headcanon in which BR and Alien are in the same universe. But that's just your headcanon until the MONEY approves it. (Even if you're Ridley Scott, yes.)
As for easter eggs, those don't make shared universes. Else you'd have Spaceballs sharing the Alien universe (and Star Trek being in the same universe as Star Wars, and Indiana Jones being in the same universe as Star Wars and consequently of Star Trek and so on, and so on.)
I know this is not a Blade Runner post. But it's relevant, considering how many people consider the shared universe notion canonical.
It isn't.
Go read the official Prometheus timeline. It may have gotten outdated here and there, but that's just further proof it's the Money that controls the canon.
Cheers.