The Batman’s [spoiler] already starred in a really great [spoiler] movie

polygon.com:

The Batman is a movie full of villains, from crime lords like Carmine Falcone and the Penguin, to classics like Catwoman and the Riddler. While that pretty much covers the main plot, superhero fans won’t be surprised to learn that near the end of the movie, writer-director Matt Reeves teases one more villain who’s in play for future Batman sequels.

This villain is played by the excellent Irish actor Barry Keoghan in The Batman, recently seen in Eternals. While the character is still shrouded in mystery, Keoghan has already given us one performance that proves he’s up to the task: The Killing of a Sacred Deer.

[Ed. note: This post contains spoilers forThe Batman.]

After Riddler gets put in Arkham Asylum, at the end of The Batman, he finds out he’s next-cell neighbors with a chatty inmate. While he doesn’t introduce himself, it’s unmistakably Keoghan as the Joker. But should he appear as Batman’s most iconic villain a future The Batman sequel, it wouldn’t be the first time Keoghan showed up in a movie as an unnerving psychopath.

For those who missedThe Killing of a Sacred Deer — which based on box office was almost everyone — Yorgos Lanthimos’ excellent movie stars Keoghan’s Batman co-star Colin Farrell as a well-meaning doctor and family man, Steven Murphy. One day, Steven meets a young man named Martin Lang, played by Barry Keoghan. Following that encounter, the movie gets stranger and stranger — Martin starts randomly appearing everywhere in Steven’s life, insisting that if Steven doesn’t kill either his wife, son, or daughter, Martin will kill them all.

Without giving away any more details from the movie’s story, we’ll just say that Keoghan is haunting in it. He is a cold unfeeling psychopath with no compunction