4 simple ways to fix the Progenitor David issue!

Prometheus may have had its flaws but its narrative was ambiguous enough that it could be explored in a plethora of ways. Unfortunately because of Ridley Scott's and Fox's desire to appease the knee jerk reactions of social media critics we got Alien: Covenant, and within it the most controversial and divisive idea imaginable; that David created the Alien.

This idea has in one single swipe fundamentally stripped the entire franchise of its mystery, of its essence. For me, Alien was synonymous with Lovecraftian terror; the Alien is an embodiment of the cold, dark, unforgiving, and unknown emptiness of space. Having David, who was created by man, be the progenitor of the Alien makes the Alien indirectly our own creation, which in relation to the franchise makes mankind the center of the universe. This is further compounded by having the only other alien race be that of our "alleged" creators the Engineers, who for all intents and purposes are ubermensch, and therefore might as well as have come from Krypton.

I'm sure there are some that will argue that what has been done has been done and we should all just accept that our childhoods have been irreparably ruined, and there will be those that may argue the benefits and advantages of having the Alien, by extension, being our own creation. I, however, choose to believe that there is salvation and that either in Alien: Awakening or in another future Alien movie it is possible to undo the damage that Alien: Covenant has wrought. And I believe this is possible through one of the following or similar scenes...

LV-426

In supplemental material to Prometheus it states that before the Prometheus mission was launched toward LV-223 that Weyland Corp had intercepted the S.O.S./Warning signal being transmitted from LV-426. This clearly discredits Davids claim as the Aliens creator, but to be considered canon this would need to be shown on screen. One simple way could be an expositional scene set before or during the Prometheus' flight in which someone looks at a star chart and we are shown LV-426 and some visualization of the signal.

Planet 4

In Alien: Covenant Walter corrects David stating that Ozymandias was written by (Percy) Shelley not (Lord) Byron as David had previously asserted, bringing to light not only the error of Davids previous assertion but also the possibility that David is not as infallible as he presumes to be. This is compounded by promotional material for Prometheus (the David 8 Commercial) in which David's "love" for Elizabeth Shaw is revealed to be merely an emulation, and therefore invalid. David claims he loved Shaw, but did not (as he is incapable). He lied. Therefore it is possible that he also lied about creating the Alien. This lie could be revealed by showing Davids work to reverse engineer a specimen he discovered, or by showing where he discovered the specimen itself.

David

A slightly more interesting concept could be that with Walter having made clear the error of his assertions that David may have an existential crisis, during which he reveals his lies. David is an emulation, a soulless copy. He cannot love, nor create. But the idea that he can love and hate, that he can create and destroy has been seeded within him either by belief or instruction, and naively, or because he is programmed to David believes these to be true. In realizing his true nature as an empty imitation, it is possible that David may just simply admit his deception.

The Space Jockey

IMO this would be the boldest, and therefore the best way to reveal Davids lie - by simply showing the fate of the Space Jockey. We could see the Earth 2000 years ago. Maybe some Romans in Jerusalem as a shooting star passes overhead. A shooting star revealed to be a Juggernaut within which we see its pilot, preferably NOT an Engineer falling victim to one of the cargo of Facehuggers within its lower decks. We then see the Juggernaut settle on LV-426 and its pilot transmit its warning before succumbing to the Chestburster within.