This seems a little contradictory:
"So we did Prometheus - that heaved it off the ground - and Covenant is a follow-through to Prometheus. So we now know who created this, and why, and the next one's a joining up of the storyline. It touches on mortality, immortality and the real question of who created us and why."
What is Scott saying here? That the Engineers aren't the top of the food chain? That they did create us but not for the reasons we think? There is a clear connection between the Engineers and humans. It makes me wonder if our creation is a violation-perhaps to a higher power we haven't seen yet? We were created in their image, but what if the image of "God" is terrifying?