While there’s been no mention of Holiday appearing in The Batman, Four villains who did pop up in The Long Halloween will be present in the movie: Catwoman, played by Zoë Kravitz; Riddler, played by Paul Dano; Penguin, played by Colin Farrell; and Carmine Falcone, played by John Turturro.
It’s also unclear if Harvey Dent is involved in The Batman, as the city’s district attorney in the movie is a brand-new character named Gil Colson, played by Peter Sarsgaard.