The superhero pic dives into North American theaters on Dec. 21. James Wan's Aquaman made a giant splash in its China debut, grossing $93.6 million to land the top showing ever for a DC comic book adaptation two weeks ahead of its U.S. debut. Aquaman — starring Jason Momoa in the titular role — also marks the biggest opening ever in China for any Warner Bros. title, besting Ready Player One by 66 percent. Among Warner Bros./DC movies, it launched 92 percent ahead of Justice League and 78 percent ahead of Batman v Superman: Dawn of Justice. Plus, it has...