What new classics have we declared off-limits?
No Country For Old Men (2007)
Why someone would want to remake it: Cormac McCarthy's rich, cinematic novels are likely to be mined for movie material for decades to come, and it's not impossible that some suits will eventually spark to the idea of remaking "Country" with new stars and, shudder to think, a more "satisfying" ending.
Why they shouldn't: Although they typically work from their own original scripts, the Coen Brothers found a perfect match in the pre-existing "No Country." Nevertheless, they were able to turn the adaptation into a movie that could belong nowhere else but in their unique filmography, next to "Fargo," "Miller's Crossing," "Blood Simple" and the subsequent "True Grit" (itself a remake based on a book). "No Country" belongs to them now, at least on the big screen. Furthermore, good luck finding a performer who would even attempt to fill Javier Bardem's Oscar winning shoes as the film's terrifying antagonist Anton Chigurh.