Roderick Davis, 37, of Cerritos pleaded guilty on Thursday to receiving stolen property and commercial burglary. As part of his plea deal, he will serve two years and four months in state prison.
He would have faced at least four years in prison if convicted of the charges, the District Attorney's Office said.
A call Thursday to a spokesman for Paramount, which will release the film in May, was not immediately returned.
Davis was arrested Oct. 4 in West Hollywood during a sting operation by detectives who learned that some of the stolen material was being offered for sale to several entertainment gossip Web sites.
They posed as potential buyers for the images and set up a meeting. When Davis arrived, they took him into custody.
The items stolen from the Universal Studios lot were said to contain confidential materials related to the long-awaited fourth installment of the popular adventure series.
"Indiana Jones and the Kingdom of the Crystal Skull," is directed by Steven Spielberg and stars Harrison Ford, Cate Blanchett and Shia LaBeouf.