From the Anchoress:

Full-length theatrical trailer for the Coen Brothers remake of True Grit, to be released Xmas, 2010.

Shorter Mattie’s-eye-view version with music by the Peasall Sisters, labeled a teaser trailer:

The Dude standing in for the Duke will be interesting to see. The trailers suggest that the Coen Brothers’ version will be darker and scarier than the 1969 Henry Hathaway original.

Hat tip to Bird Dog.