DUNE
Because they still haven't made one for those who actually read and appreciated the books! Okay, maybe the miniseries count, but if I'm being honest, I haven't watched it... but the effects, from the little I've seen, are kinda bad. Also, Dune goes fucking wild both in the philosophical analysis as well as in the chain of events. I mean, a kid turns into a worm that lives and suffers for millennia for the sake of mankind, how cool is that? And since I wouldn't care about putting butts on seats, I wouldn't have to cast popular but poorly fitting actors, nor would I have to change the essence of some characters and even entire storylines to appeal to the postmodern contemporary Western/American audience.
I'd require help for everything but I'd have the last say, and I'd make sure to stay as close to the series as possible, making nothing but aesthetic changes here and there (as long as it doesn't affect the visual symbolism of the OG books, ofc).