The comic book industry has played with a series of tropes that help build up the value of superheroes and enrich the medium. One of, if not the most successful tropes in the medium is that of the "old man" superhero trope. These stories explore the triumphant return of an aged hero in a world that needs them. What has worked brilliantly for Batman, Wolverine, Hulk and even Hawkeye has had very mixed results with Superman.
Source：https://www.cbr.com/dc-comics-old-man-superman-pros-cons/
