DC Comics’ latest superhero spectacle, “Shazam!” follows the comedic adventures of Billy Batson (Asher Angel), a teenage boy who transforms into an adult superhero called Shazam (Zachary Levi). A buff, lightning-bolt-emblazoned man-boy, Shazam isn’t as well-known now as he used to be. But he is one of the most important heroes in comic history.
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