The additional filming with these actors don’t sound extensive and will reportedly only take a week.
It’s unclear if Ezra Miller or Jason Momoa will be returning.
Part of the reason fans wondered if Michael Shannon would be coming back is due to the enormous amount of past stars making their return for the Snyder Cut, including Ben Affleck’s Batman, Henry Cavill’s Superman, Gal Gadot’s Wonder Woman, and even Jared Leto’s Joker.