Another major voice is backing the Jean Grey rumor.
YouTuber Nerdrotic now says Sadie Sink is indeed playing Jean Grey in Spider-Man: Brand New Day, stating plainly that “it is true.”
According to Nerdrotic, this would mark the introduction of an MCU X-Men character, not a Fox-era Variant, signaling Marvel is finally moving forward with its own mutant lineup on screen.
An MCU Jean Grey, Not a Fox Variant
Nerdrotic stresses that Sink’s Jean Grey is not connected to the Fox X-Men appearing in Avengers: Doomsday.
Instead, Spider-Man: Brand New Day would introduce a true MCU Jean Grey, making Spider-Man the entry point for Marvel’s next generation of mutants.
If accurate, this supports growing speculation that the film quietly sets up the MCU’s post-multiverse future rather than relying solely on legacy characters.
Jean Grey and the Return of Savage Hulk
One of the more surprising claims is that Sink’s Jean Grey is responsible for turning Bruce Banner back into the Savage Hulk.
Mark Ruffalo is confirmed to appear in Brand New Day, and the rumor suggests Jean’s powers play a role in undoing Banner’s merged Professor Hulk state.
That would tie the X-Men directly into one of the MCU’s longest-running character arcs and raise the stakes far beyond a typical Spider-Man story.
Mutants Triggered by Secret Wars
Nerdrotic also echoes a growing theory tied to Avengers: Secret Wars.
The claim is that incursions and multiversal chaos will activate dormant X-genes across the MCU, explaining why mutants suddenly begin appearing after years of absence.
If Spider-Man: Brand New Day introduces Jean Grey ahead of Doomsday and Secret Wars, it would position the film as the spark that ignites Marvel’s full mutant era.
Release info
- Spider-Man: Brand New Day : July 31, 2026
- Avengers: Endgame re-release: September 25, 2026
- Avengers: Doomsday: December 18, 2026
- Avengers: Secret Wars: December 17, 2027
