there were some Easter-eggs that might simply have been in-jokes, such as Dallas's resume saying he once shipped cargo for Tyrell Corp.
Don't recall when that bio was written or by whom, but remember that ALIEN came
before Blade Runner. So, it might not be an easter egg or even an in-joke, but just Sir Ridley recycling a name from a previous, obscure context into a new, more prominent one.
if you want to link them, there isn't much stopping you.
Actually, there isn't anything at all — it's your game. If you want, you can cross your Bladerunner over with Bubblegum Crisis or Star Wars or My Little Pony, nothing (except possibly good taste) can stop you.
You can do it. But the point is: Ligan
can't.