Bingowings said:

But BACK ON TOPIC.

What about the backwards stretching story thread in Alien?

Ash being on board couldn't be just a coincidence.

He was sent to protect the Alien - which creates all sorts of questions that we may get (unsatisfactory) answers for in Prometheus.

How did The Company know that the find was valuable? A prior encounter seems the most likely explanation

Why is the Alien considered more valuable than any of the Space Jockey technology that might be salvageable?

Why not just send in a specialized team to grab some of the eggs and take them to an isolated research facility?