When last we saw the book of fate, WWI flying ace the Phantom Aviator had taken possession of the book. He took it with him to WWII, where he met up with Blake Baron, who was based on a Sgt. Nick Fury war comic.
Baron testified at the Youngblood murder trial about what happened next.
With the book in Storybook Smith's hands, he became a superhero for the original Allied Supermen of America. His wife testified next.
As for Smith's daughter, we get a glimpse of what happened to her:
She ultimately became the superhero Riptide and the victim in the Youngblood murder case.
Moore has finally linked up the Extreme universe's history with what he had made up for Supreme. But more than that, he created a history rich in genres to explore, from cowboys to Conan-style berserkers. In Youngblood and other places, Moore would start to draw on this history, but it had so much more potential.