I've read a lot about the books and the story is fascinating but I doubt they're going to go into the really weird areas. I mean later on in the series you've got aliens powerful enough to flatten three dimensional space into two dimensions and even control the speed of light. In fact the reason the speed of light is the way it is was because of intervention by different alien races and it was infinite. Now it was slowed down. This shit gets really, really bizarre and you're basically dealing with very, very high tech and reality altering aliens.
Yeah, I think they can have a pretty good "general audience" story up to the 4 "generals" with their secret plans, but once it does the time skip after the fall and the aliens arriving with their wondership and all that....well, we'll see. I think the fleeing ship, the pluto repository, the "dark forest" stuff with the space mines and all that is gonna be hard to make compelling enough TV.
Of course I kinda feel like the ENTIRE trilogy is based on a flawed premise, the trisolarians don't really NEED Earth, they just need a stable star system and everything else they can make on the spot with their technology, so why are we even fighting? Of course this is the flawed premise in damn near ALL alien invasion stories (other than perhaps the one with the idiot aliens that just happen to have captured an automated interstellar ship just for travel so they still invade) so it just is what it is.
Hopefully it does well and opens the door for all the other great sci-fi lit out there that isn't Foundation, Dune and Starship Troopers (and Ender's Game, I suppose). I'd love to see Moties, the Cheela, or even an ambitious stab at Night's Dawn with the Adamists, Edenists, and the wacky ghost possession of that series.