Yes, for example, 'Able was I ere I saw Elba' could potentially be related to a heroic story of Napoleon. It's a palindrome that can be seen as having a connection to a long - standing and well - known figure's story.
It's possible that some poets or storytellers might create palindromes to summarize or add a unique touch to long heroic stories. For instance, in a fictional heroic story about a knight's journey, a palindrome could be crafted like 'Noel saw I was Leon' where Noel and Leon could be characters in the story. This would make the palindrome an interesting and unique element within the narrative of the long heroic story.
There might be some that are created specifically within the context of certain long heroic stories in literature or folklore. However, it's not a common occurrence. Most palindromes are more general in nature. But if we consider something like 'Madam, in Eden, I'm Adam', it could be part of a heroic creation story, where Adam could be seen as a heroic figure in the context of religious or mythological stories.