Lady Gaga discussed this subject while explaining how the movie inspired her new album Harlequin, which collects reimagined covers that she and Phoenix sing in Joker, as well as two original songs. The singer-songwriter and star of movies like A Star is Born and House of Gucci started off by telling EW:

The Oscar-winning singer stars opposite Joaquin Phoenix in the upcoming sequel as the disturbed lover of his titular Batman villain.

In 2019, “Joker” became an improbable box office smash and cultural juggernaut. Sure, the R-rated crime drama was based on the ubiquitous Batman villain. But this take on the Clown Prince of Crime was darker and more disturbing than your average comic book adaptation - more akin to Martin Scorsese’s “Taxi Driver” than the DC

Despite the challenges, "Joker: Folie à Deux" is still expected to perform well at the international box office, with projections of $80 million to $85 million over the weekend. However, even with strong international sales, the film may struggle to match the global success of the original, which grossed over $1 billion worldwide.

As Joker 2 nears its release, director Todd Phillips has opened up about the future of Lady Gaga’s Harley Quinn. During a red carpet event, Phillips discussed the possibility of a standalone film for Gaga’s Harleen Quinzel.