For a movie that's meant to represent the birth of a brand-new cinematic universe (the DCU), James Gunn's slight and slaphappy take on "Superman" doesn't feel much like the start of anything.  In part,

David Corenswet's slightly puppyish Superman radiates a joy in what he's doing, but he’s far from invincible. That lends the film emotional stakes.

The first reactions to "Superman" are in, and they have some positive things to say about David Corenswet and the future of the DC Universe.