What is about Westerns that make them so conducive to great story telling? I guess all the technology and modern law enforcement we have today is taken out in the plot, so you can see what really makes human beings tick. I don't care if they're about lawmen/vigilantes (Unforgiven), cowboys (Lonesome Dove), comedies (Butch Cassidy), spaghetti (Good, Bad, and the Ugly), modern (No Country For Old Men)...westerns just trump other genres when it comes to the setting for their storytellying.
The Coen brothers make epics that truly draw upon a chosen setting. The films are not epic in scale, but in the power of the story and its ability to convey a principle that is applicable to the entire human experience.
When I watch that trailer, I see an epic. I have not been this excited by a trailer since the Two Towers.
I have yet to be truly disappointed by a Joel & Ethan Cohen brothers film. Despite my initial shock upon hearing of this project, the teaser trailer assures me that they're going to knock it out of the park once again.
It's kind of like when you see Daniel Day-Lewis or Robert Duvall attached to a project, you know it will at least be worth a view.