I think some 70's/80's movies would do well remade:
"Rolling Thunder"

Vietnam Vet vs. murderous outlaws set along the Texas border. Could be a Tarantino treatment.
"The Keep"

Nazis vs. Satan set in an ancient castle during WW2. Great book btw, the movie was Meh.
"Southern Comfort"

Natural Guard weekend warriors vs. Cajuns in the swamps of Louisiana
I'd like to see a Frat Pack version of "Three's Company"... alas probably a few years too late.
Kristin Wiig as Chrissy
Tina Fey as Janet maybe
One of the Wilson brothers as Jack Tripper
Ben Stiller as Jack's buddy Larry
Will Ferrell as Mr. Furley
Molly Shannon as Lana
Vince Vaughn as some sort of rival to Jack