- In his first patrol Alan teaches a wife-beater a lesson. As pointed out by Katherine later, the first's Superman career started out with him confronting a wife-beater in Action Comics issue #1.
- The Superman Family still keeps the force-field belt that Brainiac 5 gave the first Supergirl in Action Comics issue #276.
- Kath's Supergirl costume is Superwoman's -Kristen Wells- outfit minus the cape.
- In Chapter 17 Kath mentions briefly Kara Zor-El once journeyed into the realm of Death all unknowing, and was brought back unconscious to the hands of Superman, during an early battle with Mongul. All of it happened in War World.
- During a discussion, Klar and his wife bring up the Crisis on Infinite Earths.
Shout Out / Superman of 2499: The Great Confrontation