Here's the thing. The whole idea of "ALIEN" is the fear of the unknown. Walking into the derelict for the first time was scary, because that was Alien, and unknowable. Everything else that happened in the film fell into that category.
But in Prometheus, it was knowable and hence not scary. And it won't be scary in Alien Covenant either if Ridley is going for the same thing again.
I'm trying to think back, and I think the only scary thing in Prometheus was that moment when Fifield and the other dude were hanging out in the pyramid and there was the ping. The knowledge that there was something alive in there with them, and knowing that it was most likely NOT the same old Alien made it frightening.
Only if Ridley makes the new thing unknowable, and truly Alien he may succeed, but even if it is amazingly well done and gross, that will not accomplish anything if it is a repeat of past horrors.