Jon Spaihts was the original writer on what became Prometheus and it was his script that got the project moving forward with any real momentum. Over the weekend, a draft of Spaihts' Alien: Engineers turned up online and certainly seemed to be genuine.
And so it was, with Spaihts himself tweeting:
This dates back to when the film featured facehuggers and chestbursters. Many of the other pieces are just the same, however – and in the same places too.
Having just read it once, and pretty quickly, it looks to me like Engineers already had some of the problems of Prometheus baked-in, though maybe not the majority; conversely, it is missing some of the better and more memorable moments of the finished film.
Seems to me like the film actually needed one more draft, not any less. Something to pull it all together, bringing the best of Spaihts and Lindelof and Scott into a coherent piece and then making sure the structure and character motivations all added up better.
Alien: Engineers is a fascinating document for fans of the series. A shame it wasn't officially released as part of the otherwise massively comprehensive Blu-ray set, really.