Originally, III was intended to slip its chapters between what we‘d already seen in I and II, but DC editorial asked for big changes, both in format and content. Instead of four bookshelf volumes, as before, they asked for a twelve issue, standard half-tab format miniseries that took the story forward, up to and including the time of the Legion of Superheroes.

This presented one problem immediately, since those thousand years were poorly documented, so there were few opportunities for the storyline to cross with known events. This made the whole thing, I felt, inferior to the first two.

(Overall, perhaps the change was for the best, since one of the chapters I had planned was a very dark take on Captain Marvel.)