Hollywood and Middle America
The movie business is designed to sniff out dollars. It chases money better than any other industry in America. When something works, Hollywood runs it down and shakes coins out of it and then abandons the carcass as soon as there's no more cash. The next 18 months are going to be strange because the films that just made some money are going to dictate what you will see from here on in until another shift or change happens in the culture.
Hollywood just made a ton of money by putting out a film that appeals to conservative, pro-military Middle Americans. This is an audience for which the coastal enclaves (with their Fifth Columnists, of course) have a special kind of contempt. No one makes a movie that will play in rural Mississippi unless it has Transformers or Super Heroes in it, and, even then, the audience they're chasing is young, Asian and male.
Someone is going to make another version of American Sniper, and then there will be a half dozen knockoffs or films of a similar nature. They will chase the rapidly evaporating movie patron until there's nothing left of the industry. They'll do that because someone will wisely figure out that they can put on a television show that appeals to this audience and make bank.