Zack Snyder debuted a new look at the Justice League Snyder Cut during IGN Fan Fest. Called "The Mother Box Origins" and set to the Tom Waits song "Time," the CG sequence shows the heroes that make up the titular Justice League.
Announcement by Kevin Smith and Zack Snyder for the Snyder Cut's Red Carpet Premiere Event. March 17, 2021, at 8 PM PST on Twitter/Facebook/Youtube/here, whenever they have an official link.