Beetz appeared in the original 2019 “Joker” as Sophie Dumond, a single mother and the neighbor of Joaquin Phoenix’s Arthur Fleck. How Beetz could reprise her role is an open question: Although the film depicted Arthur entering into a romantic relationship with Sophie, it’s revealed that the majority of their scenes together were a delusion from Arthur’s imagination. The film left Sophie’s fate ambiguous, with Arthur leaving her apartment after realizing they weren’t truly in a relationship, so it’s possible Beetz could appear as a fantasy rather than a real human being.
Should she return, Beetz would re-team with Phoenix and original “Joker” director Todd Phillips, who is co-writing the script with Scott Silver. Lady Gaga is reportedly playing Harley Quinn, the Joker’s longtime comic book love interest and criminal accomplice.