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Sadie Sink’s Secret ‘Brand New Day’ Role Fuels Jean Grey Talk and New Mutant Rumors

The tight lid on her character points to Marvel’s careful plan to fold mutants into the MCU.

Overview

  • Marvel and Sony credit Sadie Sink in Spider-Man: Brand New Day yet have not revealed her character.
  • The trailer shows mind-controlled crowds and confirms the ninja clan known as the Hand, which points to a telepathic foe.
  • Reporters and fans now favor Jean Grey as Sink’s role, though the studio has not confirmed any identity.
  • Fresh rumors say the movie could feature more than one mutant, with Cyclops floated by online scoopers as a brief appearance.
  • The footage also sets up Peter Parker’s changing powers and brings in Bruce Banner and the Punisher, with release set for July 31, 2026.