A spring groundbreaking for the Lucas Museum of Narrative Art, planned to open on Chicago's prime lakefront property, may not happen. U.S. District Judge John Darrah ruled Thursday that the state's public trust doctrine may been infringed upon, allowing a lawsuit by the preservation group called Friends of the Parks to proceed.

Mayor Rahm Emanuel said he would talk over next steps with "Star Wars" creator George Lucas and his financier wife Mellody Hobson. Lucas picked Chicago for his collection of Norman Rockwell paintings, Star Wars memorabilia, and more, over his hometown of San Francisco, but could still consider another location.

Emanuel says he thinks the Lucas museum "would expand Chicago's cultural offerings."