A special feature on the UK Steelbook edition of Prometheus reveals that Weyland's mentor was Eldon Tyrell, creator of the replicants in Blade Runner. It makes about as much sense as anything else in Prometheus.
The Prometheus Honest Trailer cuts to the quick, and is absolutely, positively full of spoilers.
"Loom" is a short sci-fi film inspired by Blade Runner and directed by Luke Scott, Ridley Scott's son.
Content warning: There is some brief nakedness between 9:45 and 12:00 that may not be safe for work.