First Spider-Man: Brand New Day trailer and new Avengers: Doomsday teasers appear online as Marvel and Sony frantically battle footage leaks

Get me proper pictures of Spider-Man!

17 Dec 2025, 10:20 · TechRadar

News By Tom Power published 17 December 2025

New details and footage about Avengers 5 and Spider-Man 4 have leaked online (Image credit: Marvel Studios/Sony Pictures) Share Share by:

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The first trailer for Spider-Man: Brand New Day has been leaked
Fresh details about Avengers: Doomsday's next two teasers have also appeared online
Marvel and Sony have issued multiple copyright takedowns on the footage

Marvel has suffered more teaser leak-based agony after new information about Avengers: Doomsday's next two teasers appeared on the internet.

Just 24 hours after Doomsday's first spoiler-filled teaser leaked online, fresh details about the highly-anticipated movie's second and third teasers have now surfaced.

The Disney subsidiary isn't the only movie studio contending with a major leak. Indeed, two days after Spider-Man 4 story spoilers landed online, Sony executives are also likely pulling their hair out after a low-quality recording of Spider-Man: Brand New Day's first trailer has been shared across the *ahem* web.

I won't be sharing links to the leaked videos and/or screenshots of said footage. However, I'm about to discuss some aspects of the teasers from this point on. If you don't want to know anything about them, my spoiler-free guides on what we know so far about Avengers: Doomsday and everything we know about Spider-Man: Brand New Day should be your next port of call.

Potentially big spoilers immediately follow for Avengers 5 and Spider-Man 4. Proceed at your own risk!

Is Sadie Sink playing a hero or villain in Spider-Man: Brand New Day?

Sadie Sink (left) was added to Brand New Day's cast earlier this year (Image credit: Netflix)

One of the biggest mysteries surrounding Spider-Man's next adventure in the Marvel Cinematic Universe (MCU) is the identity of Sadie Sink's character.

Ever since Sink was reportedly cast in Brand New Day, speculation has been rife about who she'll play. And, while Spider-Man 4's first teaser doesn't confirm which character she's been cast as, it drops a big hint that she's been hired to portray a villain.

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