This will bomb
DC has completely oversaturated themselves in recent years and the movies haven't been good. They've been "ok" at best.
People are suffering from fatigue of getting lackluster movies thrown at them and aren't going to respond to a Superman actor that nobody even knows. James Gunn is talented enough and all, but Suicide Squad was a total bomb and it's a sign of things to come. There's no need for this new DC universe at all.
Just stick with Matt Reeves' "The Batman" universe and its realism that people actually like and want to see more of from here on out.