Spider-Man: Brand New Day has spun its way into theaters — and there's something about the Marvel movie's end credits scene that's dominated my thoughts since I left my screening.

I've already written about the post-credits stinger in my Spider-Man: Brand New Day ending explained piece, but I didn't elaborate on what it could be teasing. That's because, based on a new theory I have about this Spider-Man film's end credits scene, I deemed that discussion worthy of its own article.

It goes without saying, but *full spoilers immediately follow for *** Spider-Man: Brand New Day. If you haven't seen it yet: bookmark this page, read my

Spider-Man: Brand New Dayreview to see if it's any good, and then watch it at your local theater. Once you've completed those steps, re-open this page — it'll be worth the wait, I promise.

Alright, let's first review what happens in Spider-Man 4's post-credits scene, which centers on the Spidey Tracker app developed by Ned Leeds.

Initially, a flashing marker, accompanied by an automated voice message that says "New Spider-Man sighting", indicates that the titular hero is still in New York City. However, the message soon starts saying "Location unknown", which highlights that Spider-Man's actual whereabouts are, well, unknown. Cue the app zooming out to try to find Peter Parker.

Eventually, the app zooms out far enough that it not only shows us the entire Earth, but also that the popular Marvel Cinematic Universe (MCU) character can't be found. That's until the app moves away from our world, lays down a new pin that indicates Spider-Man is somewhere in space, and ends with the voice message saying "Location found."

What does that mean? The obvious answer is that Spidey is no longer planet-side. I know, shock, horror. What isn't clear, though, is why he's in space. Again, there's an easy answer for this: it's got something to do with Avengers: Doomsday and/or its sequel Avengers: Secret Wars.

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That pair, which come out on December 18, 2026 and December 17, 2027, mark the end of Marvel Phase 6 and the divisive Marvel Multiverse Saga. And, while current Spidey star Tom Holland isn't confirmed to appear in Doomsday, the fan-favorite A-lister will, by virtue of his popularity, feature in one or both of the aforementioned films. So, it would make a ton of sense if Brand New Day's end credits stinger is teasing his involvement in Doomsday and/or Secret Wars.

Nonetheless, what if — and I realize this is a huge if — the Spidey Tracker isn't picking up Holland's Spider-Man, but one of his fellow webheads?

Now, I know that's a stretch, but hear me out. After all, everything we learn about the Spidey Tracker in Brand New Day suggests it's tailored specifically to the MCU's Spider-Man, so why would it detect another wallcrawler, such as Tobey Maguire or Andrew Garfield's, instead?

Well, for one, we don't actually know that the Spidey Tracker has been custom-built for Holland's version. If it hasn't, there's no reason why it wouldn't detect one of his multiversal variants.

That multiversal aspect is perhaps the most crucial part of my theory, too.

The next two Avengers movies will be the culmination — and celebration — of every Marvel Universe we've seen on the big screen. That includes the MCU, the original Fox X-Men franchise, and — based on myriad rumors that have been circulating online for months — the realities inhabited by Maguire and Garfield.

Furthermore, Avengers: Doomsday's story synopsis has already confirmed that it'll revolve around the threat posed by Incursions.

These multiversal calamities occur when the barriers between two universes break down, and lead to a collision that permanently destroys one or both worlds. As such, Doomsday will feature heroes from three distinct universes — the MCU, original FoX-Men, and The Fantastic Four — battling to save their realities.

But are these the only universes we'll visit in Avengers 5? It would be a glaring error if Marvel overlooked Maguire and Garfield's worlds in Doomsday and/or Secret Wars, and I don't think anyone believes that the comic giant would.

It's for that very reason, then, that I believe Brand New Day's post-credits scene isn't actually showing us that Holland's Parker has gone off-world. No, I'm convinced that the Spidey Tracker is actually picking up Maguire or Garfield's Spider-Man — and, of the two, it's the former that it's detected.

Think about it. Doomsday's first proper trailer appears to suggest that the FoX-Men have successfully navigated an Incursion. I speculate more on this in my Avengers: Doomsday trailer breakdown article, but essentially, the teaser's first few seconds show Charles Xavier/Professor X shielding his eyes from a humungous, blinding explosion. Of course, this might not be the final moments of the FoX-Men destroying another world to save their own, but what else could cause such a massive and bright blast if not the destruction of an entire universe?

And what's that got to do with Maguire's Spider-Man? Well, maybe it's his reality — aka the Sam Raimi Spider-Verse — that's being annihilated in that scene. If so, it's possible that a giant mega-Incursion involving the MCU, Fantastic Four-Verse, FoX-Men universe, and Raimi-Verse happens at the same time in Doomsday, which results in the FoX-Men proactively destroying the Raimi-Verse because their reality is most at risk of colliding with it.

Should that be the case, it would explain why the Spidey Tracker detects Maguire's Peter Parker instead of Holland's and subsequently backs up my admittedly wild theory.

There's the tiniest shred of evidence that I might be onto something, too. During a cute chat with kids on the Celebrity Surprise YouTube channel, Holland was asked if Maguire would appear in Spider-Man: Brand New Day. Holland's reply? "He's not in the movie [Spider-Man 4], but... yeah, I... yeah, careful now."

The implication here is that Holland knows something about when and where Maguire's version of the character could show up next. Holland is famous for having loose lips when it comes to MCU spoilers, too, so the fact that he stops himself here before he reveals something is, in itself, revealing.

Does he know that Maguire will feature in Doomsday and/or Secret Wars? I wouldn't be shocked if he does. After all, Holland, Maguire, and Garfield all shared the screen in 2021's Spider-Man: No Way Home. If they still keep in touch, it's plausible they've discussed their possible involvement in one or both forthcoming Avengers films, with Maguire potentially telling them — in the strictest confidence — that he's in Avengers: Doomsday. For the sake of my offbeat theory, I hope that's the case.

In the meantime, learn everything we know so far about Avengers: Doomsday, get the lowdown on Avengers: Secret Wars, and find out how to watch the Marvel movies in order.

As TechRadar's senior entertainment reporter, Tom covers all of the latest movies, TV shows, and streaming service news that you need to know about. You'll regularly find him writing about the Marvel Cinematic Universe, Star Wars, Netflix, Prime Video, Disney Plus, and many other topics of interest.

An NCTJ-accredited journalist, Tom also writes reviews, analytical articles, opinion pieces, and interview-led features on the biggest franchises, actors, directors and other industry leaders. You may see his quotes pop up in the odd official Marvel Studios video, too, such as this Moon Knight TV spot.

Away from work, Tom can be found checking out the latest video games, immersing himself in his favorite sporting pastime of football, reading the many unread books on his shelf, staying fit at the gym, and petting every dog he comes across.

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