Even though we haven’t seen Penguin in the DCEU yet, he was referenced in Justice League when Alfred Pennyworth told Bruce Wayne that he missed the days when one’s biggest concern was exploding wind-up penguins, so clearly Batman and Penguin already have some history in this continuity.
If Penguin does appear in The Batman or another DCEU movie, this would be his third time depicted in a live action film.
Burgess Meredith reprised the character for the 1966 Batman movie that was based on the popular TV series, and Danny Devito played Oswald Cobblepot in 1992’s Batman Returns.
Penguin is also currently portrayed by Robin Lord Taylor in the Fox series Gotham, which chronicles the characters rises and falls from power.