Sadie Sink as Mary Jane? Fans react with hilarious concerns over ‘Spider-Man 4’ casting

The Marvel Cinematic Universe currently buzzes with Spider-Man 4 casting reports that mention Sadie Sink. The actress is known for her role as Max Mayfield in Netflix's Stranger Things. The precise role that Sadie Sink will play remains unclear though speculation spreads across fan and critic circles about her upcoming part.

Speculation suggests that Sadie Sink could play Mary Jane Watson in the upcoming Spider-Man production due to her status as a key character in the traditional Spider-Man canon.

Industry insider Jeff Sneider released this scoop through The Hot Mic with Jeff Sneider and John Rocha as reported by ComicBook.com.

Mary Jane Watson is arguably the most familiar Spider-Man character, having been classically Peter Parker's love interest. Zendaya portrayed Michelle Jones-Watson, also known as MJ, in three Spider-Man movies in the MCU.

Although Zendaya has the same initials and is dating Peter, no word has been given that Sadie Sink's character will be MCU Mary Jane.

This vagueness opens the door to speculating whether or not Sadie Sink could be brought in as the "real" Mary Jane.

There are also other rumors that Sadie Sink might be acting in other roles, such as Jean Grey of the X-Men series or Black Cat, but these are less likely in the scenario of the film and the future of the MCU when the X-Men are added.

Meanwhile, the fans on social media are losing their minds. How do they bring in two MJs? If they bring them in, what happens to Zendaya?

Some are angry, a few are side-eying and others are mocking all of it.

---

Internet reacts to Sadie Sink being cast as Mary Jane Watson in Spider-Man 4

While most fans are left asking, "What happens to Zendaya?", others are making jokes about how Marvel is finally done with her, while others believe this might be the worst thing the studio has ever done.

A user (@Mutant_Menace) stated:

"If this is true it'll be the dumbest thing marvel has ever done."

We like the confidence, but let's not forget that this is the same franchise that deemed Morbius worthy of theatrical release—twice.

A user (@lettuce_b_c) declared:

"Ugh, too many SpiderMan movies. Marvel movies are in such a bad place right now. too woke, abstract, and weird."

One user (@heeldrew1) mentioned,

"Finally no more Zendaya."

That’s a brave thing to say in 2025.

A user (@HereisLewi) commented:

"That’s literally the funniest rumour I’ve ever heard. People really think they’re just gonna replace ZENDAYA????"

Yes. And?

A user (@M1KEY16553371) mentioned:

"Oh this is sooooooooooooooo disrespectful to zendaya I cannot allow this."

You and an army of stans are about to go to war.

A user (@TMundy_15) quipped:

"So we’re gonna have a Michelle Johnson and a Mary Jane Watson in the same universe and just have Peter going thru a mental crisis over which MJ is supposed to be his, yet he’s engaged to one of them in real life?????????"

A user shared a humorous GIF, stating:

"Gwen Stacy realizing she not coming back to be killed for 1000th time."

Gwen Stacy disrespect is a thing. Every time she thinks there's any chance she gets to come back, Marvel is like, "Your sole purpose is to plummet off a tall thing—repeatedly."

A user (@teckknique) laughed it off saying:

"Huh? Zendaya is literally right there 😂 she could’ve been Black Cat or Gwen."