On Wednesday 16 December 2026, something rare happens in Finnish cinemas: the year's two most anticipated blockbusters open on the same day. Dune: Part Three concludes Denis Villeneuve's science fiction trilogy, and Avengers: Doomsday kicks off the final act of Marvel's Multiverse Saga. In the United States both open on Friday 18 December, and American film media have already nicknamed the date Dunesday.
The comparison with summer 2023 is obvious. Back then, Barbie and Oppenheimer opened on the same day, and instead of a fight the result was the Barbenheimer phenomenon, which boosted both films' admissions. Will the same happen in December? We go through what we know and clearly separate it from what we estimate.
What we know for certain
The facts are simple. Dune: Part Three is based on Frank Herbert's novel Dune Messiah. It is directed by Denis Villeneuve and distributed in Finland by Warner Bros. The running time listed by cinemas is 2 hours 20 minutes, and its KAVI age rating is K12.
Avengers: Doomsday is directed by Anthony and Joe Russo. Robert Downey Jr. plays Doctor Doom, and the announced running time is 2 hours 45 minutes. In Finland the film is distributed by Disney and shown in both 2D and 3D. Its age rating had not yet been published at the time of writing.
Both films' first trailers have been huge successes. According to Variety, the Doomsday trailer drew more than 500 million views in its first 24 hours. Dune's final trailer was released at the end of October and shows war, conspiracies and the darkest phase of Paul's story.
Why don't the studios get out of each other's way?
In the film industry, releasing two blockbusters on the same day has traditionally been a bad idea. Both have to share screenings, IMAX auditoriums and media attention. So why are Warner and Disney sticking to their dates?
In our estimate, there are three reasons.
First, the holiday season is crowded. A mid-December release gives a film the whole Christmas holiday, when people have the time and inclination to go to the cinema. If one studio moved to January, it would lose the best window for audiences.
Second, the audiences are different, even though both are science fiction spectacles. Dune appeals to viewers who appreciate auteur cinema, a slow rhythm and a serious tone. Marvel's audience expects team-ups between heroes, humour and recognisable characters. The audiences overlap, but not completely.
Third, Barbenheimer changed the thinking. In 2023, it became clear that two very different event films arriving at the same time can create news value that benefits both. Neither studio says this out loud, but the rapid spread of the "Dunesday" name shows that the phenomenon is already taking shape.
The view from Finland: IMAX auditoriums are scarce
The most concrete impact on cinemagoers in Finland concerns the largest auditoriums. Dune was made specifically as an IMAX experience, while Disney launched its own Infinity Vision certification for premium auditoriums alongside Doomsday. There are few IMAX auditoriums in Finland, so with two films competing for them, the best screenings in the first weeks should be booked early.
The screening times at Elokuvateatteri Star in Oulu, for example, show how cinemas are balancing things: Doomsday's first screenings begin on the night of release, while Dune plays in the same auditorium's Dolby Atmos screenings at different times. Almost every cinema is building its programme so that you can see both on the same evening – provided you can sit still for more than five hours.
Who wins? An estimate from three perspectives
Admissions: Historically, Avengers films are among the biggest box-office draws of all time, and Endgame became the highest-grossing film in the world. Dune: Part Two performed excellently, but not at the same level. We estimate that Doomsday will draw more viewers worldwide. Dune, however, may perform relatively better among adult audiences and over the longer term.
Critics: Villeneuve's Dune films have received exceptionally good reviews. Marvel's films in recent years have divided critics more. This, however, is an estimate based on the previous films, not on either of the new ones.
Cultural footprint: This is where the contest is closest. The final instalment of the Dune trilogy could become a science fiction classic if it succeeds. Doomsday, on the other hand, is part of an ongoing story, and its ultimate value will only become clear when Avengers: Secret Wars arrives a year later.
Which should you see first?
If you only have time to see one of them in release week, we suggest choosing the one whose spoilers interest you most. Plot twists in Marvel films spread extremely quickly online, and in an event film like Doomsday, surprise returns are part of the experience. The plot of Dune is already known to those who have read the book, but Villeneuve's interpretation may still surprise.
If you want to see both on the same day, we suggest starting with Dune. It demands concentration and is a heavier experience, so the more colourful Marvel spectacle will feel lighter afterwards. The other way round, the evening could become exhausting.
Summary
Dunesday is not a fight between two films but proof that big film events still bring people to the cinema. For cinemagoers in Finland, December 2026 is an exceptional month: in the same week we get the conclusion of one of the most significant science fiction trilogies of the 2020s and Marvel's biggest attempt in years to return to the top.
You can find both films' trailers, background information and age ratings on our film pages. We will update the pages as age ratings and the first reviews are published.