Ok, against my better judgment, I'm mildly optimistic about this one:
* the immediate, obvious first thought is that this book series is already finished, and, ground which has been tread over endlessly - blah blah Benioff & Weiss mostly did a great job on GoT when they had completed books to work from blah blah.
I liked The Three Body series a lot, but while there are some decently well developed characters, the books are clearly in the Bradbury/Asimov "big cool science-y ideas" tradition where rich, interesting, complicated characters are really not what the author is interested in. The Double Ds are theoretically capable of fleshing out and improving the characters they are adapting from a book. Or at least assembling a team of writers who are capable of that. This definitely is going to be needed.
* They have a person (edit: at least I assume from his name) of Chinese descent who "will join Benioff and Weiss in adapting the book and its two sequels", whatever that means. Hopefully a) he will actually play a very major role in this project and b) he understands both contemporary Chinese society and the Cultural Revolution in a deep enough way to say something interesting about that. This is really what I'm wanting out of this series most of all.
* The Chinese author and the excellent Chinese translator of the first and third books are involved in some manner or another. Hopefully they too will play a very major role in this, similar to how The Expanse TV series has worked.
* Rian Johnson has some sort of executive producer involvement, which might or might not be significant in the creative development side of things, and which might or might not be positive.
Of course, who knows when this will actually wind up being made. Probably never.
Anyway, in conclusion, these were instant classic books. Highly recommended if hard sci-fi is your thing. You should read them.