Pat says that Ted Knight built the Cosmic Staff, not Starman. In the comics, Ted Knight was the original Golden Age Starman who built the Gravity Rod, which eventually became the Cosmic Staff.
Despite Hourman apparently dying in the previous episode's flashback, Pat tells Courtney that the hero survived and tracked the Injustice Society to Blue Valley before dying with his wife in a car accident.
Pat says that Brainwave killed Johnny Thunder, Hawkman, and Hawkgirl ten years ago when the Injustice Society attacked the JSA.
In the portrait showing the Injustice Society within their base of operations, another member from the group is seen in the background, resembling Shade.
Notorious Golden Age members Johnny Thunder, Hawkman, and Hawkgirl are mentioned. They were all killed by Brainwave during the battle.