Dunesday won't be a bloodbath: it's a rising tide for two films

Why do we keep describing two movies opening on the same day as a duel, when the audiences barely overlap on a Venn diagram? "Dunesday" makes for a great nickname and a lousy theory of how moviegoers behave.

Here is what we know. Both Avengers: Doomsday and Dune: Part Three arrive in theaters on December 18, 2026. Dune just released its final trailer, and Warner Bros. is selling it as the trilogy-ender, set 19 years after Paul became emperor. On the Marvel side, advance tickets went on sale in September, and Variety's figure, as relayed in a Lainey Gossip column, was $50 million in presales three months before release. Separately, according to EmpireCity Box Office, presales are moving in Marvel's favor by a 3.2x or 4x to 1 ratio. Treat that as a tracker's claim, not a settled result.

The "lopsided" presale story is less damning than it sounds

Read the headlines and you'd think Dune is already dead. We don't buy it. The analyst behind those reports reportedly said the comparison isn't a knock on Dune's sales. That matters. A ratio only tells you Marvel is bigger. It says nothing about whether Dune is taking a slice of Marvel's pie, or whether either film is hurting the other.

Our read is that these are two different purchases. One is a communal, lore-heavy, fan-service ritual. The other is a prestige sci-fi spectacle that people want on the biggest screen possible. Someone who buys a premium-format seat for Dune isn't being "lost" by Marvel. They're probably the kind of person who goes to both, one weekend after the other, or even the same one.

The more interesting number is the ceiling. The Lainey Gossip columnist guesses around $300 million for Doomsday's opening and floats up to $400 million for Dune's, while still believing Doomsday will make more. Those figures don't quite line up, and they're personal predictions, not tracking data, so we'd hold them loosely. But the direction is the point. When two event films share a date, the conversation stops being "should I go?" and becomes "which one first?" That is a very good problem for exhibitors.

The collision is a marketing gift

Release dates used to be treated as a zero-sum game: the loser blinks, the winner gets the weekend. Dunesday flips that. The shared date produces a shared story, with outlets framing December as a blockbuster showdown, as Times of India's coverage of the clash shows. That's free advertising neither studio could buy alone.

There is also a neat split in how the two films may be judged. The same columnist expects Doomsday to win the money and Dune to win the awards, with at least ten Oscar nominations. That is a forecast, not a fact, and we'd hold it loosely. But it captures why a rivalry is the wrong frame. Different victories, different audiences, different shelf lives.

The real casualties are the films that can't be events

If we're right, the pain lands elsewhere. Premium screens are finite. Showtimes are finite. Casual attention is finite, and in the weeks around December 18 a lot of it will probably be spoken for. Any mid-sized release that wanders into that stretch could have trouble finding screens, never mind headlines.

This is the angle we've seen the least of, because it's less fun than Marvel versus Villeneuve. But we think the smart move for every other distributor is to flee the window entirely, and we'd expect the calendar around it to look oddly empty.

Our verdict

Stop asking who wins Dunesday. Marvel will probably take the bigger opening, if the presale reports hold, and Dune will probably take the bigger critical afterlife. Both can be true, and both studios can walk away happy.

What should you do? Go to both, ideally not on opening night for the one you care less about. And if you work in any other corner of the release calendar, stay far away from December 18.