Of all the Batman villains that have yet to be adapted into a live-action movie, Clayface presents some of the most interesting potential for casting. The villain Clayface has been rumored to appear as the villain of Matt Reeves’ The Batman – Part II, though his monstrous appearance and impressive superpowers might make him a better fit for the DCU continuity in Batman: The Brave and the Bold. In the comics, Clayface has a variety of origins, most of which involve a failed actor whose body becomes transformed into a mutant sludge monster.

https://screenrant.com/casting-clayface-live-action-dc-batman-movie/