The release of “Star Wars: Episode VIII” has been delayed from May 2017 to Dec. 15, 2017, the Walt Disney Co. announced Wednesday. The date change postpones the next “Star Wars” installment set to follow the box-office hit “The Force Awakens.” Though “Star Wars” was once synonymous with the summer blockbuster, the date change means that the franchise will again look to dominate movie theaters in the holiday season. It has proven a lucrative match for “The Force Awakens,” which has made a record $861 million domestically and $1.88 billion globally in five weeks of release.