Jackson has defended the film this week against criticism of its content as well as accusations that he split the series into a trilogy as a money-grabbing ploy.
[Andy Serkis, Peter Jackson, Martin Freeman, Richard Armitage and Elijah Wood]
In an interview with Entertainment Weekly, the director suggested that it's unlikely that his latest film will replicate the Oscars success of The Lord of the Rings trilogy.
"I think we've got great possibilities in the below-the-line categories [at the Oscars]. Above the line, I don't think so much," Jackson explained. "I wish it was a year where we could celebrate Ian McKellen as supporting actor, or Martin Freeman - or Andy Serkis, for that matter - as a supporting actor."
He added: "The acting awards seem to elude us, at least for these types of films. I don't know why."
Jackson has also expressed disappointment that Andy Serkis has never won an Academy Award for his CGI portrayal of Gollum.
"There's a suspicion that somewhere between Andy and the finished result, other people are involved," the filmmaker said. "Obviously there is a visual effects component; there is a CGI creature, and compositing and lighting and various things.
"But motion capture now is so well developed that every muscle in Andy's face is replicated on Gollum's face. And everything Andy does is accurately translated to Gollum. It is the closest thing to digital make-up."
Nominations for the 85th annual Academy Awards will be announced on January 10, 2013.
The Hobbit: An Unexpected Journey is released on December 13 in the UK, and December 14 in the US.
Watch the trailer below: