Elijah Wood has confirmed that the first trailer for The Hobbit: An Unexpected Journey will be attached to “The Adventures of Tintin” when it releases into US theaters on December 21, 2011:
“I have not seen it. I have spoken to people about the trailer, I have a sense of what’s going to be in it…I think it’s going to be in front of Tintin when it’s released in the States.”
The Hobbit: An Unexpected Journey is scheduled to hit conventional and 3D theaters on December 13, 2012. The Hobbit: There and Back Again follows on December 14, 2013.
Source: Digital Spy