The $225 million-budgeted tentpole has the lofty ambition of relaunching the DC Universe after the last iteration of the comic book universe had flamed out with a string of costly bombs, including “The Flash,” “Aquaman and the Lost Kingdom,” “Shazam: Fury of the Gods” and “Blue Beetle.”

The review embargo for Superman has now lifted, and critics are suggesting that James Gunn has cracked the secret to success when it comes to adapting comics. While there’s been much talk and debate over how Superman will be received by film critics,