Last March, Disney was sued by Kelley Wilson for copyright infringement. She claims that the trailer for Frozen copied her short film The Snowman.
As the judge notes, both the trailer and the short film are about a snowman who loses his nose on a frozen pond. The snowman must battle an animal who also wants the carrot nose. The animal wins the carrot nose but eventually returns it to the snowman.
Disney previously tried to have the case dismissed, but was rejected by the judge. A second attempt to get the lawsuit thrown out, in the form of a motion for summary judgment, has also been rejected.