Hammer's Slammers, by David Drake (all the installments). Problem is, Hollywood would probably screw it up.
They could do his Lt. Leary series, but only if they got the guy who did the Master and Commander script and the director from same.
Most of Diane Duane's work is pretty cinematic; I think her Harbinger trilogy would work well as a series of movies.
Bill Baldwin's Helmsman series would work well, too.
Love to see a good adaptation of Hammer's Slammers...
The Regiment was a great story, but a PC Hollywood would goon that the hell up...