I like it when important things happen in a story, and then more things happen as a consequence. Cause and effect stuff. And also characters who talk about what happened.
It's basic stuff, but neither of those very important things happen in Prometheus. To draw the obvious example, Alien has this wonderful cadence to it where the characters sit around and talk about what to do next after things happen. Should they land? Who's going in? What do we do now? Oh fuck, Kane's dead. What do we do now? And the story builds directly upon those things. Along the way the established tensions among the characters play out against the rising strain of events and the result is compelling as hell. A leads to B leads to we're fucked.
In Prometheus Shaw gives birth to a giant squid and it is a great sequence. It's also a total non-event in terms of the story and is forgotten the moment she stumbles down the hallway in her underwear and falls through the door into the 3rd act. Another character returns from the dead as a melted mutant and tears through most of the security staff. That's kind of a big deal? Like, it just killed a half dozen people! Not only does this lead to absolutely nothing in the story, but it's barely even acknowledged by other characters.
In any semi-decent script events like those are hugely consequential, but Scott is content to have them be neat set pieces totally detached from the story. There's a lot of that in the film. Space penis snake anyone? They just chucked that shit at the screen and called it a story, not bothering to fit the pieces together.
The film starts to get interesting when the two women, who have this nice rivalry/tension simmering through the film, are the last survivors and make it to the surface. Maye we'll see those tensions play out as events unfol....oh fuck she ran straight for some reason. There goes that.
On the plus side, Idris Elba gives a nicely understated performance, where he conveys almost wordlessly how his character is putting the pieces together and understands the stakes, and what he's gotta do. His final moment is kinda robbed by there being those two useless co-pilots, but hey.
Prometheus is pretty. It has some neat sequences, and great cinematography. But in terms of script, this thing makes Independence Day: Resurgence look like a masterpiece of narrative craft. In theaters, I went back and forth on whether being pretty was good enough. Maybe it was as a dumb as bricks theatrical experience, and the spectacle was enough in the moment, but the film is posturing to be so much smarter than that, and it all posturing. The script is as bright as the scientist who petted the alien snake penis.