Dunesday Survival Guide: How to Watch Dune: Part Three and Avengers: Doomsday, and Which to See First

On Friday, December 18, 2026, moviegoers face a scheduling problem that studios usually go out of their way to avoid. Denis Villeneuve’s Dune: Part Three and the Russo brothers’ Avengers: Doomsday open in theaters on the same day, and the internet has already christened the clash “Dunesday.” With a little over six weeks to go, both films have released final marketing, both are selling tickets worldwide, and both are expected to be among the biggest events of the holiday season.

The obvious question for anyone who loves both franchises is practical: how do you actually watch them? Do you try a same-day double feature, split them across a weekend, or pick one and wait for the other? This guide covers the release details, the premium-format situation that has defined the rivalry, the runtimes, the ticket picture and a set of recommendations for different kinds of viewers, so you can plan before the best seats disappear.

The Quick Answer: Release Dates and Where Each Film Plays

Both films are scheduled for December 18, 2026 in North America. Dune: Part Three begins its international rollout two days earlier, on December 16. Avengers: Doomsday was originally dated May 1, 2026, and was pushed back to December in 2025, which is how the two films ended up on a collision course. Reports earlier this year suggested Marvel might move its film up a week to December 11, but as of this writing both studios are still marketing the December 18 date, and Disney is actively selling tickets for it.

What Is Dunesday, and Why It Is Not Barbenheimer

The nickname borrows from 2023’s “Barbenheimer,” when Barbie and Oppenheimer opened together and audiences turned the coincidence into a cultural event, with both films winning at the box office. Analysts, including Comscore’s Paul Dergarabedian, have noted how much that moment depended on the surprise that two such different films could thrive side by side. Dunesday is a different case. Both films are large-scale science fiction and fantasy spectacles with enormous ensemble casts, and they are aimed at overlapping audiences.

That overlap is why the build-up has been less friendly than it was in 2023. Dune’s IMAX exclusivity, Marvel’s decision to put premium-format tickets on sale early, and the rapid-fire trailer releases from both sides have fuelled an online rivalry between the fan bases. The actors have tried to keep things light, and many moviegoers simply plan to attend both. The fan-made poster below, by the digital artist BossLogic, captures the spirit of that double-feature mood.

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Fan-made “Dunesday” crossover poster combining Avengers: Doomsday and Dune: Part Three. Artwork and credit: BossLogic, via Instagram. This is unofficial fan art and is not an official studio poster.

The IMAX Question: The Biggest Practical Difference Between the Two Films

If one fact shapes how you should plan your weekend, it is this: Dune: Part Three has locked up IMAX in the United States. The format confirmed at an investor presentation that the film would have exclusive use of its domestic screens, roughly 400 locations, for the first three weeks of release. That means Avengers: Doomsday will not play on a US IMAX screen during its opening run, although reports indicate it may still appear in IMAX in select international markets.

The deal makes sense for the film. Villeneuve shot part of Dune: Part Three with IMAX cameras, and the earlier installments built their reputations on large-format presentation. Tickets for IMAX 70mm screenings went on sale eight months before release, several venues sold out within minutes, and reports of resale prices as high as $1,000 circulated for the scarcest seats. At London’s BFI IMAX, the film reportedly set a first-day presale record with 33,000 tickets sold in 24 hours.

Marvel’s answer has been to lean on Disney’s own certification program, called Infinity Vision, alongside Dolby Cinema, ScreenX and 4DX. Avengers: Doomsday premium-format tickets went on sale on July 20, with Disney reporting that first-day advance sales reached $16.5 million, roughly double the first-day figure for Deadpool & Wolverine. The film is expected to open on more than 4,000 North American screens, which also gives it a wider footprint than Dune: Part Three in standard auditoriums.

What this means for your seat choice

Practically, the IMAX arrangement turns the weekend into a negotiation between format and film. If you want the large-format experience for Dune: Part Three, especially on 70mm, you need to book early and be flexible about showtimes. If you want Avengers: Doomsday in the biggest possible format, your best bets are Infinity Vision, Dolby Cinema or ScreenX locations near you, and 4DX or 3D for viewers who like motion seats and extra depth. Neither film requires a premium screen to work, but both have been designed with big screens in mind.

How Long Is the Marathon? Runtimes and Scheduling

Current AMC listings put Dune: Part Three at 2 hours 30 minutes and Avengers: Doomsday at 2 hours 45 minutes. The Dune figure has grown since advance IMAX tickets first listed 2 hours 20 minutes, and the Doomsday figure matches the 165 minutes first reported by The Hollywood Reporter when the film’s premium tickets were announced. Neither runtime is guaranteed to be final until the films are released, but because tickets are already on sale, the room for change is small.

For context, Dune: Part Two ran about 166 minutes, Avengers: Infinity War ran 149 minutes and Avengers: Endgame ran 3 hours and 1 minute. So both new films fit comfortably within the range of their predecessors. Add trailers, ads and the time it takes to move between auditoriums, and a same-day double feature will take close to six hours from the first showtime to the last credits. That is worth planning around if you need to eat, travel or take children along.

The Case for Seeing Dune: Part Three First

There are several good reasons to start with Villeneuve. The first is simple scarcity: the IMAX run is the one premium-format experience that cannot be replicated elsewhere, and the best showtimes are the first to vanish. If large-format projection is part of why you love the series, book that ticket first and fit the other film around it.

The second reason is tone. Dune: Part Three adapts Dune Messiah, which picks up 17 years after the events of Dune: Part Two, with Paul Atreides now on the throne and facing a conspiracy against his rule. Timothée Chalamet and Zendaya return alongside Florence Pugh as Princess Irulan, Rebecca Ferguson, Javier Bardem, Anya Taylor-Joy and Jason Momoa, while Robert Pattinson joins as the shape-shifting Scytale. The final trailer, released on October 27, leans into political intrigue and the cost of power. It is a film that benefits from a calm, attentive viewing, and a morning or afternoon show before the weekend crowds can help.

The third reason is that a heavier, slower drama can be easier to take in when you are fresh. If you see Doomsday first, the quieter register of Dune may feel like a sharp change of gear late in the day. For anyone who has not yet revisited the earlier films, that is also a reason to watch Dune: Part Two again before December 18, since the story assumes you remember who is loyal to whom.

The Case for Seeing Avengers: Doomsday First

The argument for starting with Marvel is built around spoilers and shared experience. Avengers: Doomsday is a plot-heavy ensemble film with surprises that fans expect to be discussed online within hours of the first screenings, and the cast list is enormous: Robert Downey Jr. as Doctor Doom, Chris Evans, Chris Hemsworth, Anthony Mackie, Tom Hiddleston, Florence Pugh, Sebastian Stan, Paul Rudd, Pedro Pascal as Reed Richards, Joseph Quinn, and Tenoch Huerta Mejía as Namor, plus the X-Men. If avoiding spoilers matters to you, an early show on opening day is the safest approach.

The Marvel film also has the heavier homework. It is the first Avengers team-up since Avengers: Endgame in 2019, it leads straight into Avengers: Secret Wars on December 17, 2027, and it carries storylines from several other films and series. Disney also staged a re-release program of Endgame in September with new footage, which suggests how much emphasis the studio is putting on catching viewers up. Fans who are already comfortable with the saga can go in cold; newer fans may want to watch a few key titles first, which is another reason to schedule the Marvel film second if you need a few days of preparation.

Presale data also hints at a bigger crowd for Marvel in the opening days. Reports citing Forbes put worldwide Doomsday presales above $125 million, including an estimated $65 million in the United States, and some trackers have said it is outselling Dune: Part Three by a ratio of roughly three or four to one. By comparison, Dune was reported to have passed $25 million in domestic presales with 48 days to go. Early sales are not a reliable forecast of opening weekend, and the two films are being sold in very different ways, but the figures suggest that Doomsday showtimes in the best seats and formats will fill early too.

Which One Should You See First? A Simple Decision Guide

Ticket Strategy: How to Get the Seats You Want

Ticketing for both films is already live in many markets, and the largest formats are the most competitive. A few practical points help. Book the premium-format screening first, then choose the second film around it. Look at multiple theaters in your area, since a theater that does not have IMAX may still have Dolby or ScreenX for Doomsday. Pick showtimes with a gap of at least an hour if you plan to see both on the same day, so you can eat and reach the next auditorium.

Opening weekend and the week after are the hardest to book. The days immediately before Christmas fall within the holiday schedule, when many theaters add screenings but also see higher traffic. If you are flexible, Sunday and weekday showtimes are typically easier to book than Friday and Saturday evenings. Use only the official theater chains and the ticketing apps you already trust, because resale prices for the scarcest IMAX 70mm seats have been high.

Early screenings are also worth watching for. AMC has listed IMAX 70mm “insider” screenings of Dune: Part Three on December 14, four days before the general release. Availability is likely to be limited, but they offer a way to see the film earlier and avoid the Friday crush.

What About Streaming and Home Viewing?

Neither studio has announced a streaming date for its film, and this guide does not assume one. Historically, Marvel titles have moved to Disney+ and Warner Bros. titles to HBO Max after their theatrical runs, but release windows vary and can change. For viewers who prefer to wait, the realistic plan is to treat the theatrical run as the main option and watch the studios’ announcements for home release details. Because both films were built around large-format presentation, many fans consider the cinema the best way to see them.

Fans who want to prepare at home can do so in the meantime. A rewatch of Dune: Part Two is the most useful single step for Dune, and a refresher on Avengers: Endgame and the recent multiverse-era Marvel films will help with Doomsday. Every Movie Plug’s The Billion-Dollar Club: The 10 Highest-Grossing Movies of All Time is a good reminder of how much box-office history sits behind the Avengers brand.

The Stakes: What Each Film Needs to Prove

For Warner Bros. and Legendary, Dune: Part Three is a chance to finish a trilogy that has been both a critical and commercial success. Dune: Part Two earned about $715 million worldwide and a 92 percent rating on Rotten Tomatoes. The IMAX exclusivity also means a larger share of the film’s gross is likely to come from premium-priced tickets, even if it sells fewer tickets overall.

For Marvel, Avengers: Doomsday is a test of whether the multiverse storyline can recapture the scale of the Infinity Saga. It marks the return of Robert Downey Jr. in a new role, and it has to carry a large number of characters across film and television history. Some analysts have projected a record-setting domestic opening in the $250 million to $300 million range, though those figures are speculative. The film is also the first part of a two-film finale, which raises the stakes for audience goodwill going into Avengers: Secret Wars.

The overlap of the two releases is not only a competition. It is also a rare moment when two ambitious, large-scale films are drawing attention to the theatrical experience at the same time. If the Barbenheimer weekend showed anything, it was that audiences will turn a scheduling conflict into an event if they feel invited to take part.

Directors who think in terms of spectacle have shaped this moment, and Every Movie Plug’s Five Directors, Five Visions looks at the signature styles of the filmmakers who changed the way blockbusters are made. For another look at how a film’s opening weekend can define its legacy, read Today in Cinema, November 2: American Gangster Opens in 2007, which covers how that film went to number one against a rival opening the same day.

Frequently Asked Questions About Dunesday

Final Verdict: Plan Early, Pick Your Format, Then Pick Your Order

Dunesday does not have to be a choice. The films are different enough in tone and style that seeing both in the same weekend is realistic, and the practical constraints, mainly IMAX availability, runtime and spoilers, point to a fairly simple plan. Book the premium-format showing that matters most to you first, schedule the other film around it, and refresh your memory of the earlier chapters if you need to. Whichever film you see first, the weeks leading up to December 18 will bring more trailers, more reviews and more ticket news, and Every Movie Plug will keep covering them.