As for which particular DC movie Church might appear in, Aquaman is the safest bet.
I’m not supposed to talk about it, it’s a movie I shot last year.
Thomas Haden Church (Sideways, Wings) revealed in an interview with JoBlo that he filmed a mystery role last year for an upcoming superhero movie that isn’t going to be part of the Marvel Cinematic Universe.
They’re trying to keep it-and good luck to ‘em-with, y’know, today man, I’m surprised it hasn’t already kinda been revealed.”