When Oswald talks about the future with Antonio Falcone, he shares the story of Rex Calabrese, a gangster who ruled his neighborhood back in the day. According to Penguin, Rex was the kind of guy who would help pay the rent, and when he died, the residents threw him a parade. That’s a little different from Rex “The Lion” Calabrese, who is in the pages of Batman Foreverhe reveals that he is Catwoman’s father, and Selina Kyle is now the heir to a crime empire.
Of course, The Penguin takes things the other way, as Batman instead he reveals that Selina is Carmine Falcone’s illegitimate child, but the name casting Rex as an old-school Gotham mafia boss is a deep draw to the comics.