Spider-Man Brand New Day: 10 things to expect from Tom Holland's next MCU adventure

Theory Briefing

• Sadie Sink is rumored to play Jean Grey in Brand New Day, which would make a Spider-Man film the surprise entry point for the X-Men in the MCU.
• Fan theories are treating the casting as a deliberate breadcrumb, suggesting Marvel is using Spider-Man's next solo outing to quietly expand its mutant storyline.
• The 'Brand New Day' title itself carries weight — in the comics it marked a radical reset for Peter Parker, fueling speculation the MCU is engineering a similar clean-slate moment.
• Ten anticipated story elements are circulating online, showing how much audience expectation is being shaped by leaks and theory rather than official announcements.