The MCU shattered expectations with Spider-Man: No Way Home, leaving Tom Holland’s Peter Parker alone in a world that forgot him. Marvel Studios has now revealed the next chapter: Spider-Man: Brand New Day. The title nods to a comic arc that rebooted Spider-Man’s life, and fans are buzzing over whether Harry Osborn, a pivotal yet absent figure in the MCU, will finally debut as Parker’s new ally or a future villain in this reset timeline.

Spider-Man: Brand New Day promises a clean slate for Peter Parker, but could this fresh start open the door for Harry Osborn’s long-awaited MCU arrival?

Marvel Studios’ title reveal for Spider-Man 4 sent shockwaves through the fandom, with many theorizing Harry Osborn’s long-awaited MCU arrival. The Brand New Day arc in Marvel Comics famously rebooted Peter Parker’s relationships after the divisive One More Day storyline, resurrecting Harry Osborn as one of the figures. With Peter Parker's previous supporting cast erased from memory, the MCU could mirror this reset, paving the way for Harry Osborn's potential debut.

Brand New Day storyline brought Harry Osborn back to life and portrayed him as having been living in Europe for several years. Introducing him now would allow Marvel to explore his fractured friendship with Parker, echoing the tragic dynamic from the previous films. While no casting announcements have been made, the narrative vacuum left by No Way Home makes his inclusion a logical and thrilling next step.

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With Harry Osborn’s debut speculated, the film’s 2026 release date positions it as a Phase 6 linchpin, but will Sadie Sink’s rumored role deepen the mystery or clarify the stakes?

Spider-Man: Brand New Day is slated for July 31st, 2026, positioning it between Avengers: Doomsday and Secret Wars in Marvel’s crowded Phase 6 calendar. Reports of Stranger Things star Sadie Sink joining the cast fueled speculation, though Sink herself remained coy. During a Happy Sad Confused podcast appearance, she addressed rumors, stating, “this is news to me.”

Fans theorize Sink could play Gwen Stacy, a role previously embodied by Emma Stone and Hailee Steinfeld. With Zendaya’s MJ out of Peter Parker’s life, her introduction would add emotional complexity and tragic potential. Others speculate Sink might debut as Jean Grey, linking Spider-Man to the incoming X-Men reboot. Marvel’s silence has only amplified the mystery, ensuring Brand New Day remains a hot topic until its release.

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Will Harry Osborn finally swing into the MCU? Share your predictions below!