Hollywood is so busy gazing into its own navel, they don't even want ideas from outside. Across the world, tons of literary content never before in English have been translated and published, and a lot of these books are jammed with ideas and approaches and concepts never seen or used by Hollywood. Fresh, new material ripe for licensing and/or theft.
But Hollywood doesn't want ANY of it! Because Hollywood is always busy trying to remake the last thing that was a hit, not trying to make new things.
Alien Covenant is at least 50% a remake of the first movie and Scott is not only proud of this, he wants to make (or remake) a ton more movies it the same series, probably all of them retellings of an existing story.
Spiderman, Batman, and Superman have all been rebooted multiple times despite the fact that everyone pretty much knows the origins for these characters. Hell, the fact that people already know is considered a PLUS, not a negative. Remake it again. Stupid moviegoers will happily buy the goddamn tickets anyway.
That's the other half of the problem: Hollywood keeps remaking bullshit but the motherfucking public rewards this by spending billions on tickets and DVDs and BDs and rentals and happily spend spend spend every damn time they remake this shit.
Geeks and nerds are the worst. You lot go to every single super hero movie to support the genre or whatever, but your devoted movie dollars go to reward completely crap and studios who don't even try, and you convince yourselves these movies are good. And you go again!
No wonder Hollywood keeps making this crap. They have no reason to make the next Arrival or take any of a dozen excellent contemporary Chinese fiction works and make a movie from that. And then they make crap like Great Wall, which flops because it is crap, and that right there will reinforce Hollywood's idea that they should just stay insular.