Terra Obscura by Alan Moore

A lovingly crafted pastiche of Golden Age superhero pulp, the story follows a roster of long-dormant, retro-styled heroes from a parallel Earth who reemerge in the modern era, forcing them and those around them to reckon with lost ideals, political consequences, and the personal costs of heroism; blending high-action adventure, mystery and cosmic threats with affectionate genre deconstruction, it delivers both pulpy thrills and a thoughtful meditation on identity, legacy, and what it means to be a hero in changing times.