Are Walter or David physically involved in creation of the Xenomorph?

Or does the answer lie with the Engineer biomechanical suit? Is the Xeno a creation of Engineer DNA mixed with Engineer biomechanics and some form of human/non human facehugger DNA? The question would be then who made the facehugger? Covenant is to delve into that, the creation of eggs. David discovers this in his research..eggs made from human Shaw's embryos, a transformed Neomorph Shaw maybe...The pieces of the puzzle have to come together.

What is the proper answer? Android or Biomechanical engineer DNA? Are the human/alien eggs we see in Covenant part of the creation puzzle? I think so....

I've been thinking about this for quite some time. If Walter is so advanced that he is partially organic there could be something to this theory. I think it's pretty important that we are being shown the "birth" of Walter in the viral video. Why would they show such a detailed process of creating him if it didn't have something to do with the plot? It seems like "Meet Walter" is meant to set us up for a big heartbreak in Alien Covenant. So yeah, I'm on board with this theory and I can't wait to see how things pan out on the 19th!

I suspected this as possible, when it was announced some time ago Fassbender would be playing a Doppelganger and not TWO Robots.

Since then it was confirmed as TWO Robots only Walter is more  Advanced... which well Technologically yes... Program Wise he is restricted.

When i first hear of the Doppelganger  i felt maybe it means the other Fassbender is different, and when we saw the Covenant Badge as Weyland-Yutani this means this ship is post Merger and so set off years after Prometheus.

This meant the other Fassbender was not a Human likeness, or say Person David was modeled off... but indeed some other Robot... but  why Doppelganger?

Which logically made me wonder if he is different and what if he is a Synthetic Construct like Elden was from the Fire and Stone Comics?

Looking at the Meet Walter Viral that came a year after (or abouts) after i pondered the above....  then indeed Walter could be more than just a Synthetic...

But we cant be 100% sure, and who knows if he plays a role in the Xenomorph it seems a bit too On the Nose so maybe its all a set up for a Red Herring?

The Engineer Suits do look Bio-Mechanical, you could almost be pushed to think the Xenomorph came from them and gained this Bio-Mechanical Suit into its Traits...

Or the Engineers Bio-Mechanical Suit was reverse Engineered off the Xenomorph or they both originated from something else. That is connected.

Lots of good points there Dave!