LAS VEGAS – Rachel Brosnahan recalled a night filming "Superman" where the newest Man of Steel, costar David Corenswet, looked especially superheroic with his cape flapping in the moonlight.

However, justifying David Corenswet’s ascension to Superman’s iconic mantle, following in the footsteps of Henry Cavill, has been a formidable challenge. As Corenswet’s Superman debut looms ...