Avengers Doomsday Trailer Could Arrive Around Endgame Encore, Insider Claims

Published 27 September 2026. Words like "tonight" or "next week" refer to that date.

Avengers Endgame Encore hit theaters on September 25, 2026, and I think a new Avengers Doomsday trailer is coming with it. Sources are also saying that same trailer should show up online a few days after the theatrical debut, though I fully expect someone to leak it early, and I am pointing to September 25th as the date to watch for that leak.

I want to walk through the insider details piece by piece so we know what to actually expect when Endgame Encore hit theaters, because there is a post-credit scene, a bridge, and a few other wrinkles worth separating out.

Why I Expect The Doomsday Trailer To Leak Before It Officially Releases

My base expectation is that the new trailer gets released somewhere first and then goes online later, the same pattern as the four story trailers that came out ahead of the Avatar release. The first of those trailers was released and described before we ever saw footage, then the second one leaked at SDCC and we all had to watch it a second time once it went official.

Because that pattern has repeated itself so many times, I said on this I feel like at this point we should be 0 percent surprised that we are going to be getting a trailer after we've probably already seen it leaked online. Even if Marvel tries to stop it from leaking ahead of the theatrical showing, I said I'm very very certain that isn't going to happen.

So my expectation is that by September 25th, a version of the new Doomsday trailer should be findable online in some form, even if the official theatrical unveiling technically comes first through Endgame Encore screenings.

Carl Says Encore Brings A Post-Credit Scene And An Exclusive Look, Not Just A Trailer

Before this update, I didn't know whether we were getting another trailer at all, or whether the marketing plan was simply to tell fans to go see Endgame Encore for some trailer-like content inside the screening. An insider named Carl cleared that up, saying, "There's a post-credit scene tying into Doomsday, then an exclusive look at Doomsday. Hopefully, that helps."

When people pushed him for more detail, Carl clarified further: "Clearing it up, there's a post-credit to Avengers Endgame encore, not a trailer, leading into Doomsday. Then, there's an exclusive look." So on top of whatever trailer surfaces online, Encore itself is expected to include a post-credit scene, something Endgame did not originally have, which then leads into a separate exclusive look at Doomsday.

I also brought back the Avatar comparison here, since the Russo brothers called those four pieces "stories" rather than official trailers, and every one of them leaked three or four days before showing in theaters before finally going online days after that. I said I would not be surprised if the Doomsday trailer, or this exclusive look, followed that same leak-then-theater-then-online sequence, though I noted the post-credit scene itself might be kept under tighter wraps.

Carl Says There Is No Confirmation Spider-Man And Wolverine Appear In The Trailer, But They Are In The Film

Carl also addressed whether Tobey Maguire's Spider-Man and Wolverine will show up in the new trailer footage, saying, "There's no confirmation that Spider-Man, Tobey, and Wolverine will be in the next Avengers Doomsday trailer. I was told Marvel at one point was considering it due to the leaks, but I'm not sure if they're still considering it. It remains unknown."

When someone then asked him directly whether they will actually be in the movie or if it's just a joke, Carl answered simply, "They are in it." I pointed out that because of prior leaks, including actual behind-the-scenes images matching descriptions we'd already heard, it's obvious to me that they're in the film, and I said we're pretty confident they'll be part of one of the opening sequences.

I take Carl not saying the trailer footage won't include them, only that he doesn't have confirmation either way, as an important detail, because it shows there is still real information nobody outside Marvel has locked down yet.

My Theory On How Doomsday's Opening Sequence Plays Out

From what I've heard through leaks, Tobey's Spider-Man universe is headed for an incursion with the X-Men universe, and the X-Men in that universe have reportedly been fighting off incursions repeatedly and are ruthless and prepared for it. I connected that to the last trailer, where we see the X-Men fighting and Professor X looking out a window, which I believe is at an Earth being destroyed before an incursion can happen.

My read is that the opening sequence of Doomsday shows the incursion itself and the loss of a character, though I acknowledged people disagree on what that loss actually means. A lot of people believe Tobey's Spider-Man won't really die, and some are hoping he gets saved by the TVA, by Loki, or by someone assembling a multiversal Avengers group for a raft of survivors who resurface at Secret Wars. I said I understand why those theories make sense, but the leaks I'm going on say Tobey does die in this moment, with Wolverine and Deadpool having been fighting him right before the X-Men destroy his universe and the film moves into Doomsday proper.

What We Think We Know About Doom's Origin In The Film

Beyond the opening, I said there are aspects of this story I feel confident about, starting with where Doom comes from and his arc of posing as a good guy before being revealed as a villain. My understanding is that reveal probably comes after Thor and Steve Rogers travel to the TVA, discover that Loki is dead, and realize Doom was responsible, before returning with that knowledge.

Even so, I acknowledged that in a three hour film there is a lot we simply don't know yet, and that while leak after leak has filled in a good picture, there will still be plenty of details that surprise us. Whether Marvel ends up officially confirming the Deadpool, Wolverine and Tobey Maguire fight before release is one of those unresolved pieces, since Carl only said there's no confirmation, not that it's been ruled out.

How do you think Marvel will handle the leaks around the Doomsday trailer and the Endgame Encore post-credit scene?