Judomaster is another character along with Peacemaker that DC acquired from Charlton Comics in the 1980's.
When Harcourt threatens his family, Vigilante responds by sarcastically telling her she's a bit late. In the New Teen Titans comics, Vigilante's origin story involved his wife and kids being killed by The Mafia.
Crazy credit: At the end of the credits there is a deleted scene of Vigilante at the stakeout.
The argument had by the team when they decide to use a beloved children's book series to provide their codename is actually one the internet has been having for years. Leota Adebayo is correct when she tells the rest of the team that the Berenstain bears are named after the creators of the book series, but that hasn't stopped countless people from believing that Berenstein is correct like Economos. Conspiracy theorists believe the existence of the confusion over the names is evidence of the Mandela Effect.
Peacemaker claims to be creeped out by Doll Man, an obscure member of the Freedom Fighters