A Single Leak Exposes Marvel’s Biggest Problem Before the Spider-Man 4 and Avengers: Doomsday Trailers Drop

Spoiler heads-up: if you are trying to go into Avengers: Doomsday or Spider-Man: Brand New Day totally clean, this is your exit. Marvel just had a very messy 48 hours.

So what actually leaked?

• Avengers: Doomsday was supposed to roll out a set of theater-only teasers during the Avatar: Fire & Ash theatrical run, according to THR. Instead, those teasers bled onto social media in low quality, and the surprise got nuked. An industry insider (MyTimeToShineHello) says these weren’t traditional trailers but four short scenes, each centered on a major character, and that Marvel even shuffled the rollout order at the last minute. Two of those characters? Steve Rogers (Chris Evans) and Thor (Chris Hemsworth), whose involvement just got spoiled for anyone scrolling.
• Fans are not taking it well. Complaints range from 'why are these theater-exclusive in 2025' to 'how did three high-profile leaks happen in under two days.' One widely shared claim even suggests the Thor leak was internal, which, if true, means someone’s job security is on thin ice. Others think this might be deliberate marketing. The quick DMCA takedowns say otherwise.
• Meanwhile, a blurry trailer for Spider-Man 4 (subtitled Brand New Day) also hit the web. Comic Book Movie says it’s legit, and Sony is busy scrubbing it from everywhere. The footage starts with Peter setting the table for where things are now after No Way Home, and it’s exactly the kind of scene you wish you were seeing in HD instead of through six pixels and a shaky hand.

The larger problem (and why people are mad)

Marvel reportedly chose to debut these Doomsday pieces only in theaters, complete with anti-piracy bumpers before them. You can guess how that went. In an era where cameras are everywhere and AI can muddy the waters with fake screenshots and Franken-clips, the theater-only approach turned into confusion soup: grainy real footage, slick fake imagery, and fans arguing over what’s authentic.

To make it stranger, multiple fan accounts claim these are the biggest leaks the MCU has seen in ages, and they happened back-to-back. Some are convinced it’s all part of the plan. Personally, if this was the plan, it’s not a good one. And if it wasn’t, then yeah, time to tighten the ship.

Spider-Man 4: the leaked opener

The Spider-Man 4 footage reportedly opens with Peter reintroducing himself after the spell that wiped everyone’s memory of him. The vibe is classic 'great power, lousy consequences.'

'Hi, my name is Peter Parker. You don’t remember me, but we used to know each other. Something bad was gonna happen, and the only way to stop it…was to make everyone forget about me.'

He goes on to underline that Spider-Man has to do the hard thing even when it breaks Peter Parker’s heart. Again: this should’ve been a pristine, official drop, not a camrip scavenger hunt.

Avengers: Doomsday: what the Thor scene is supposed to be

The Thor teaser, per the insider, shows him alone in the woods praying to Odin before a major battle. The monologue that’s circulating is what’s setting fans off — and a bunch of images attached to it are likely AI fakes. The insider who described the scene even called at least one of those images bogus.

'Of all the crowns, the realms, the pride, I ask for none of them.
Father, hear your son. I’m not worthy of life, yet I beg you let the thread run long. Not for thunder, not for war.
Let me stand long enough to see my love once more.'

About that Steve Rogers situation

Evans’ involvement — if what’s in those clips is the real deal — should have been a moment. Honestly, that’s the kind of reveal you either save for the movie or you roll out in a fully controlled, high-impact way. Letting it leak via off-screen footage is the worst version of both worlds.

Marvel and Feige: the current status

As of now, Marvel and Kevin Feige haven’t said anything publicly. The rapid takedowns suggest the leaks are real enough to worry about. For comparison, when Endgame footage spilled early, Feige told the AP:

'I wasn’t pleased. It’s not cool. It’s not fun.'

Back then, fans largely self-policed and didn’t amplify. This time, the clips spread fast, and AI noise made it harder to separate truth from nonsense.

Where this leaves things

Unless Marvel completely locks it down, expect the other two Doomsday character scenes to surface sooner rather than later. If this wasn’t a coordinated stunt, it’s a rough look for the studio. If it was, it’s not landing how they probably hoped.

Release dates, in case you’re counting down

Spider-Man 4: Brand New Day swings into theaters on July 31, 2026.

Avengers: Doomsday follows on December 18, 2026.