I was thinking about the Dr. Moreau-like story, which I had initially expected from Alien: Covenant, and suddenly I started to imagine it as a cross between Dr. Moreau and Conrad's Heart Of Darkness, with David as the Kurtz character crossed with Dr. Moreau.
This would be interesting, I think, since Colonizing is part of the Covenant's mission and that plays such a role in Heart Of Darkness. Maybe one of the crew is there to kill David or something like that.
It would also be cool since the ships in Alien have been named after Heart of Darkness.