They are popular because they offer a different perspective on the character. We get to see Batman at a different stage of his life, dealing with age - related issues like slower reflexes but also having a wealth of experience. It makes the character more complex and relatable.
There's also 'Batman Beyond' which, while not strictly just about an 'old man' Batman in the traditional sense, features an older Bruce Wayne mentoring a new Batman in a future setting. He passes on his knowledge and skills, and we see how his experiences from his younger days as Batman still influence his actions and decisions even in his old age.
There could be a young detective who looks up to Batman and tries to help him in his old age. This character might bring new perspectives and skills to the table.
Perhaps the story could revolve around Batman's legacy. He might be training a new generation of heroes or trying to ensure that Gotham remains safe after he's gone. He could be dealing with his own physical limitations as an old man while still having the will to protect the city.
The protagonist of the story was a man named Old Man. He met a beautiful girl at the bottom of the sea. The girl told the old man that she used to be an ocean explorer but disappeared during an expedition. The old man decided to help the girl find her family and began a long journey.
On the old man's journey, he encountered many difficulties and dangers, but he always moved forward firmly. He helped the girl find her family but was misunderstood by the girl's boyfriend, causing the two to quarrel. In the end, the old man and the girl decided to leave the bottom of the sea and return to land.
After returning to the land, the old man found that he had fallen in love with this beautiful girl. He decided to stay by her side and spend the rest of his life with her. Although his girlfriend still didn't understand him, the old man still firmly chose to be with the girl.
Batman comics date back to the 1930s. Over the years, they've become an icon in the comic book world. The longevity of the series is a testament to its enduring appeal and the creativity of the writers and artists involved.