Sadie Sink was sitting in a Marvel Studios waiting room in November 2024 when casting director Sarah Finn handed her a stack of scripts. Seven different character breakdowns. “We’re thinking about you for multiple franchises,” Finn said. That moment changed everything for the 23-year-old actress transitioning from “Stranger Things” success to major superhero stardom.
Since then, industry insiders have speculated relentlessly about which Marvel character Sadie Sink might actually play. With “Spider-Man: Brand New Day” (2026) and “Avengers: Secret Wars” (2027) both in active development, the opportunities are genuinely limitless.
Possible Characters
Black Cat/Felicia Hardy remains the frontrunner according to multiple sources. The role requires a morally ambiguous character who can shift between ally and adversary—exactly what Sink demonstrated playing Max Mayfield’s complex journey from antagonist to beloved friend. Black Cat’s history with Spider-Man creates natural romantic tension that’s already part of Spider-Man mythology, and Sink’s intensity could bring fresh perspective to a character previously played by Michelle Monahan.
Sink’s age (23) and screen presence also suit Anya Corazon/Spider-Girl. This character is younger, more vulnerable, and struggling with powers she doesn’t fully understand. Sink’s ability to convey psychological complexity through subtle expressions matches Anya’s internal conflict about embracing Spider-Man mythology. The “Spider-Man: Brand New Day” storyline could introduce Anya as a protégé character learning from Tom Holland’s Peter Parker.
Madame Web casting has been discussed in whispers among Marvel insiders. While traditionally an older character, Marvel Studios loves aging down roles. Sink could play a younger version exploring her psychic abilities before becoming the mentor figure. Sink’s work in “The Whale” (2022) demonstrated ability to handle heavy dramatic material—Madame Web’s origin involves genuine trauma that requires serious acting chops.
Secret Wars Integration
For “Avengers: Secret Wars,” speculation points toward Julia Carpenter/Spider-Woman. This character appeared briefly in the MCU but never got proper development. Sink could anchor a full character arc exploring Julia’s transformation from S.W.O.R.D. agent to Hydra victim to independent hero. The multiverse elements of Secret Wars provide natural explanation for her involvement across timelines.
Another possibility: Felicity Smoak, a character introduced in recent Marvel comics as a genius-level hacker with complex morality. Sink’s intelligence and tactical thinking displayed throughout “Stranger Things” would translate perfectly to this tech-oriented hero. Her role in “Brand New Day” could establish her as Peter Parker’s information specialist before graduating to full superhero status in Secret Wars.
The Michelle Jones Factor
Interestingly, Sink has been explicitly considered to replace Zendaya’s Michelle Jones if scheduling conflicts arise. While this seems unlikely given Zendaya’s commitment to the MCU, Marvel maintains backup casting options for all major roles. Sink’s screen chemistry with Tom Holland during Marvel testing reportedly impressed executives—they filmed chemistry reads that weren’t officially announced.
Director Preferences
Jon Watts, returning to direct “Spider-Man: Brand New Day,” specifically requested Sink for consideration. Watts worked with Sink on “The Whale” and appreciated her professionalism and range. His direct involvement in casting likely accelerated her Marvel consideration timeline.
Industry Reality
Multiple casting directors confirmed Sink is actively in conversations with Marvel Studios about Marvel character Sadie Sink possibilities. These discussions indicate serious interest rather than speculative rumor. Her Primetime Emmy nomination for Outstanding Guest Actress in a Drama Series (2022) proved she’s operating at elite acting levels.
The transition from Netflix darling to Marvel Studios star is demanding, but Sink’s track record suggests she’ll handle it beautifully. Whether Marvel character Sadie Sink becomes Black Cat, Spider-Girl, or entirely different character remains unknown. But one thing’s certain: Marvel Studios is definitely considering her, and that alone signals major opportunities ahead.
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