@webcomictalk - Many years ago, I developed a prequel to my webcomic "A Wish for Wings." Considering that it took many MANY years to tell the first part of that story, and I'm still working on the second part some twenty years later, I figured I'd never get to the prequel.
I did decide to tell the story as filler while I was out of town for two months, and told that story, which I called "The Long Road Home" as a short story narrated by a character in the comic.