Marvel’s first X-Man in the primary timeline arrives in Spider-Man: Brand New Day, but Jean Grey is introduced in a way that challenges the character’s familiar history. Played by Sadie Sink, Jean begins this story as an antagonist rather than a trusted member of a heroic mutant team.
The film follows Peter Parker, played by Tom Holland, after Doctor Strange’s spell removes his secret identity from the world’s memory. At the same time, it gives Jean an origin story unlike the versions audiences have seen in comics, animation and earlier live-action films.
Jean Grey enters the MCU as a threat
Jean’s villainous introduction is a striking choice because many previous adaptations presented her as compassionate, powerful and closely connected to Charles Xavier. Her most famous storyline may involve a destructive transformation, but the usual dramatic structure starts with Jean as a hero before tragedy pushes her towards the Phoenix.
The MCU reverses that progression. There is no established X-Men team yet, and no indication that Xavier’s school has already gathered a group of young mutants. Instead, the wider world appears to contain frightened people with abilities they do not understand.
A new version of Jean’s trauma
Jean has previously been portrayed by Famke Janssen and Sophie Turner across two separate film trilogies. Although those performances depicted Jean at different ages, both versions shared a central idea: she was a gifted telepath mentored by Xavier, who restricted her abilities to shield her from the trauma of her childhood.
Spoilers for Spider-Man: Brand New Day follow.
In this film, Jean is searching New York for her sister. She moves between people’s minds while following clues, but Spider-Man’s intervention leads to her capture by the Department of Damage Control. While imprisoned and subjected to testing, Jean discovers that her sister Sara, played by Olivia Booth-Ford, died in the same room.
That revelation unlocks an ability Jean did not know she possessed. Her response is not restrained or heroic: throughout the film, she lacks a clear moral boundary and forces people under her control to walk into traffic or leap from buildings.
One of the film’s most uncomfortable moments comes when Jean takes control of MJ’s mind. She uses MJ to kiss Peter, a moment that initially appears to offer the reunion Peter and viewers have been waiting for since his identity was erased. The emotional impact collapses when MJ still has no memory of Peter, while Jean ridicules his faith in true love’s kiss.
The scene echoes Jean’s darker comic-book and film history, particularly stories in which she manipulates others and exploits their vulnerabilities. However, Brand New Day places that behaviour at the beginning of her journey rather than presenting it as the fall of an established hero.
From villain to possible hero
That change creates a different question for the MCU’s future X-Men stories. Instead of asking how a dependable hero might lose control, the audience is left wondering whether someone who begins as a villain can learn to become a hero.
The approach has a clear parallel with the MCU’s version of Spider-Man. In Spider-Man: Homecoming, Peter was younger than earlier film incarnations, already powered and supported by Tony Stark. His development towards the more recognisable hero was shaped by later losses, including Stark’s death in Avengers: Endgame and Aunt May’s death in Spider-Man: No Way Home.
As Kevin Feige put it while discussing Brand New Day, the first three Tom Holland Spider-Man films functioned as the opening act of Sam Raimi’s Spider-Man movie. Jean may now be receiving a similarly extended introduction: her early story establishes the damage and selfishness she will need to overcome before she can become the Jean Grey audiences expect.
By the end of Brand New Day, Jean saves Peter’s life and abandons her immediate pursuit of vengeance, at least within New York. The film does not give her a complete redemption, but she forms a connection with someone who understands her and recognises that she is more than a rebellious power to be contained.
What this could mean for the X-Men
Jean’s capacity for cruelty remains part of the character. Whether the MCU eventually follows the Dark Phoenix storyline is unknown, but beginning with a Jean who already understands the destructive potential of her powers gives the franchise a distinctive foundation.
It also raises questions about the introductions of other major mutants. If Jean is positioned as a central figure in this new generation, how will the stories of Cyclops and Beast be shaped around her? Their relationships may develop from a very different starting point than the familiar school-and-team origin.
The standalone X-Men film remains tightly guarded. No plot details or cast have been confirmed. The older generation of X-Men is expected to appear in Avengers: Doomsday at the end of this year, but Jean’s role in that film, or in future projects, has not been revealed.
For now, Jean’s direction is clear enough: she has not begun as the compassionate telepath audiences know. She will have to grow into that identity. Spider-Man is an appropriate character to challenge her, having learned that extraordinary power does not automatically create a hero. The decisive factor is how that power is used.
Spider-Man: Brand New Day is in Australian cinemas now.
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