Sadie Sink may portray Mayday Parker in Spider-Man 4

Sadie Sink, known for her role in "Stranger Things," is joining the Marvel Cinematic Universe in the upcoming "Spider-Man 4." The specific character she will play has not been revealed, but there is much speculation surrounding her role. Many fans believe she might portray Jean Grey, Mary Jane Watson, or Firestar. However, a new theory suggests she could be playing Mayday Parker, the daughter of Tobey Maguire's Spider-Man and Kirsten Dunst's Mary Jane. This theory has gained traction after Maguire's return in "Spider-Man: No Way Home," where it was confirmed that he and Mary Jane are still together in his universe. In the comics, Mayday Parker inherits her father's Spider powers and becomes Spider-Girl, despite her parents' attempts to keep her safe. She appeared as a baby in "Spider-Man: Across the Spider-Verse." There are also rumors that Maguire and Andrew Garfield's Spider-Men will have more significant roles in "Spider-Man 4" than in the previous film. A source close to the production hinted that Sink's character will be important, particularly following the events of "No Way Home." In that film, Peter Parker decides to use Doctor Strange's spell to erase his identity, setting the stage for new developments. Details about "Spider-Man 4" have recently leaked online, suggesting that it will be titled "A Brand New Day." The film is expected to include several familiar characters, such as Andrew Garfield, Michael Keaton as Vulture, and Robert Downey Jr. as Doctor Doom. The plot indicates that after the events of "Avengers: Doomsday," Peter Parker seeks a normal life but finds himself drawn back into chaos. Ultimately, he must embrace being Spider-Man again and team up with an unexpected ally to protect his loved ones.