Sadie Sink's 'Spider-Man: Brand New Day' character may have been inspired by Mark Millar's Ultimate Universe creation, Jean Grey. Marvel Studios' Infinity Saga drew heavily from the Ultimate Universe, and while they don't directly adapt comics, the characters in the MCU share similarities with their Earth-1610 counterparts. With the Multiverse Saga ending and a new phase introducing the X-Men, the Ultimate Universe could again provide inspiration.
Sink's character is rumored to be Earth-616's Jean Grey, though the exact identity is uncertain. Industry insider Jeff Sneider predicted this months before her casting in the new Spidey film. If true, this version of Jean might have more in common with her Earth-1610 counterpart than the original Marvel Girl. Sink's character is portrayed as a street urchin, contrasting with Earth-616 Jean, but aligns with the original Ultimate Jean Grey, who had a troubled past and tremendous powers.
Millar's Ultimate Jean was caustic, contemptuous, and committed to a psychiatric hospital due to visions of the Phoenix. This 'tortured youth' persona seems to match Sink's character, who was seen on set dressed in Jean's traditional colors. However, with misinformation circulating, it's unclear who Sink is playing. Her knowledge of Peter's identity as Spidey and shape-shifting abilities align with the possibility, but confirmation remains elusive.
