Calpamos 2094-2122

I know this is a Subject that had been Discussed before, i thought maybe it could be something to Discuss again in LIGHT of Alien Covenant and how this Plot Sets up what Happened between 2094 and 2122.

In 2091 the USCSS Prometheus had set off for a System near by Zeta 2 Reticuli taking us to a Moon (LV-223) Orbiting a Giant Gas Planet

The End of Prometheus we have Dr Shaw and David leaving this Planet but prior to this we see that Dr Shaw had Broadcasted a SOS Warning to NOT come to this Place (LV-223).

In 2122 we have the USCSS Nostromo arrive at a System near the Zeta 2 Reticuli taking us to a Moon (LV-426) Orbiting a Giant Gas Planet

The Nostromo being Rerouted their to apparently Investigate a Unknown Signal.

There are some 28 Years between these Events...

So we are left with a Few Questions, which are Raised Especially after Alien Covenant.

1) Why in ALIEN had they NOT detected Dr Shaws Warning?

2) Had the Company prior to 2122 detected Dr Shaws Warning and WHY had they NOT been back to LV-223 (or could they have?).

3) If the Derelict Signal had been Transmitted prior to 2094 then WHY had we not seen signs of the Prometheus being aware of this, and WHY had it not been Investigated between 2094 and 2105 (or had it?).

4) With the Revelations of Alien Covenant and the Advent Message, then we would surely wonder WHY would none of Dr Shaws or the Derelict Signals been Detected by the Time the Company receive Davids Message.  And then WHY had they not been to Investigate prior to 2122 with the Nostromo (or had they?)

I know there are Certain Pieces of Evidence we could use to Indicate certain things, especially in Regards to the Derelict and its Signal.   But  in light of Alien Covenant the Wayland-Industries Viral site was Taken Down as it would Conflict with the Plot that there would be NO ship or Signal on LV-426 prior to the Covenant Mission.

The DVD Extras likewise could be something we may have to discard as Canon too.  

What ever the Production have to say about any of this, especially Ridley Scott maybe can be thrown out as far as Older Comments due to Change of Direction.

So Theatrically all we have to go on as FAR as the LV-426 Signal is that the SHIP looked like it was there for Longer than 17 Years.

But then we also have to ask about the Signal from LV-223.

These could be things that could have been Addressed in Sequels as we are NOT yet Concluded.