Certainly there was a LOT of potential to WHAT does a Engineer World and Ships look like... that Sadly with Alien Covenant it just never seemed to match Expectations.
To be fair way back at the Time of Prometheus i think we could have Envisioned Worlds like KRYPTON from the 2013 Movie Man of Steel (Superman).
If you have ever seen that Movie, if you look at the First Act and Imagine this World but with a Touch of HR Giger more Bio-Mechanical Aesthetic then INDEED it is maybe NOT far off what many expected to see with the Engineers.
I think that Man of Steel also did seem to be very Prometheus like as far as the Engineers go, it seemed to borrow some ideas from Prometheus as far as Concepts and Earlier Draft Ideas.
You could actually look at the Man of Steel Plot as far as the Kryptonians and apply that to Prometheus History. We have a Race who are Ancient and Advanced who go to Worlds to Terraform them so they can Live on other Worlds, their own WORLD is Dying...
They are a Race who Struggle to Procreate Naturally and use Technology and Advanced Nano-AI to help with this Process and their Technology. The whole SEND out Kal (Superman) to Earth Plot kind of mirrors what Ridley Scott had said about the Engineers and Jesus Christ ;)
I only say this because when i look at Krypton and the Technology the Buildings and think WHAT if we had a HR Giger Spin on this... then it would INDEED had fitted Perfectly with the Engineers.
If the Engineers Ancestors had Destroyed their own WORLD too, and began to Terraform Worlds to Spread their Species across the Galaxy, then maybe we could actually have MASSIVE Engineer Ships that Act like Huge Cities?
So maybe somewhere in the Galaxy we have many remnants of the Engineers Ships, surely its NOT just limited to the Pebble Seeding Ship, the Juggernaught/Derelict and the Scorpion Ship from Alien Covenant!
