michele_blue found the best trailer in the world bar none. Cause yeah. Here. Korea, Wild West, Geoffrey Rush, all the good times. Oh, here's a four minute trailer. Weta did the effects. Also I'm pretty sure that's the immortal Ti Lung in there.
For bonus points I refer the curious to the trailer for Sukiyaki Western Django, and since that means I'm talking about Miike movies, here's Thirteen Assassins. Which they're saying is his masterpiece.