Got a few unanswered question...
1) Is there a dotted connection between prometheus and Alien movie?
The only dot I can see is that the alien creature is through a combination of a stuff that David drop in the drink, and the guy make xxx with the gal, and the gal remove the octopus, and octopus make xxx with the engineer, and alien is born

2) Why does the engineer want to destroy earth?

3) What is the cylinder stuff? The one David took to the ship

4) For the 2 guy that was trap in the pyramid. They were kill by a worm type creature. Is it the worm mix with the special type of liquid and evolved as a gigantic worm creature?

5) What kill the engineers in the pyramid?

Anybody got any idea???

Waaaaa... imagine we all came from that one person Engineer DNA... hahahahaha
means that unknown Engineer that eat the black stuff is the god???

Then what created the Engineer..... interesting...
Prometheus II

So now...
Unknown species do something > Engineers species
Engineers commit sacrificial > Human mankind species
Human mankind (Elizabeth Shaw + Charlie Holloway] + Unknown Engineer > Green Aliens species