The director took to his Facebook page to share the image, which will be given out at this month's Comic-Con in San Diego.
Jackson recently confirmed that principle photography on the project, based on JRR Tolkien's classic book, had been completed in New Zealand.
The first instalment of the film, entitled The Hobbit: An Unexpected Journey, is due for release on December 14, with second The Hobbit: There and Back Again following in 2013.
The films star Martin Freeman as Bilbo Baggins and Sir Ian McKellen as Gandalf, with Andy Serkis reprising his role as Gollum.
Watch the trailer for The Hobbit: An Unexpected Journey below: