Probability
How the price has moved
The market opened on 29 July 2026 at 100%, a level typical of a contract with little competing interest right after listing rather than a considered assessment. It then moved through a wide range, down to as low as 38% and back up as high as 100%, across 141 recorded price observations, before settling at the current consensus of 53%. The price has not moved in the last 24 hours, holding flat at 0.0 percentage points of change, which suggests the market has found a level it is comfortable with for now rather than continuing to actively reprice the question. No single publicly reported trigger accounts for the swing from the initial 100% reading down toward the low 50s; it most plausibly reflects early traders working out how to weigh Doomsday's own drawing power against the field of other 2026 releases.
Analysis
Context
Avengers: Doomsday is Marvel Studios' next ensemble Avengers film, directed by Anthony and Joe Russo, positioned as the centerpiece of the studio's ongoing Multiverse Saga storyline built around the character Doctor Doom. It carries an unusually large returning cast pulled from across the Marvel Cinematic Universe and X-Men franchises, and Marvel has scheduled it as a December 2026 release, historically a crowded corridor for franchise tentpoles and family films.
The question asks something narrower than whether the film will be a commercial success. It asks whether its opening 3-day domestic gross, once finalized, will be the single largest of any movie released in the US and Canada during all of 2026 — a full calendar year that includes summer blockbuster season, spring franchise releases, and other holiday openings. The comparison point is the-numbers.com's year-end 2026 box office table, which uses finalized figures rather than the studio estimates reported the Monday after a film opens.
Prior Avengers ensemble films set the historical bar for this kind of comparison. Avengers: Endgame opened to $357.1 million domestically in 2019, and Avengers: Infinity War opened to $257.7 million in 2018 — both of those figures led their respective years by wide margins. Whether Doomsday repeats that pattern is what this market is pricing.
This market is unusually young and unusually thin, and both of those facts matter for reading the price. It was first recorded on 29 July 2026 at 100%, essentially treating the outcome as a certainty, which is typical of a newly listed contract before enough participants have traded against the initial quote. Since then the price has swung as low as 38% and as high as 100% across 141 recorded observations, before settling near the current consensus of 53%. That is a very wide range for a market only days old, and it signals that traders are still working out how much weight to put on films that have already opened earlier in 2026 versus the anticipated scale of Doomsday's December debut.
The consensus of 53% comes from a single venue, Polymarket, carrying $169,815 in total volume — not a large pool by the standards of major political or macro markets, so the price can move meaningfully on a handful of sizeable trades rather than a broad shift in opinion. The fact that the price has been flat over the last 24 hours, at 0.0 percentage points of change, suggests the market has, for now, found a level it is comfortable holding rather than continuing to reprice, but with only one venue and modest volume, that stability is fragile compared to markets with deeper, cross-venue liquidity.
The underlying question turns on two separate things: how large Doomsday's own opening is, and how large the biggest opening from earlier in 2026 turns out to be. Marvel's Avengers films have a track record of setting the annual high mark — Endgame and Infinity War both did so comfortably in their release years — which supports the case that Doomsday could do the same. But a full calendar year of releases, including any major franchise sequel or family film that opens strongly in the spring or summer, creates more opportunities for a rival to post a bigger number before December even arrives. The market's mid-50s pricing reflects that tension rather than skepticism about Doomsday's own drawing power.
What moves the probability
Franchise scale and ensemble cast
Avengers crossover films have historically posted the largest domestic openings of their release year, with Endgame's $357.1 million in 2019 and Infinity War's $257.7 million in 2018 both leading those years outright. That precedent pushes the probability up, since Doomsday is positioned as an even larger ensemble entry.
December release timing
A December date puts Doomsday in direct competition with holiday-season family films and other studio tentpoles for the same weekend audience, which can cap an opening even for a highly anticipated title. This timing is a modest drag on the probability compared with a less crowded release window.
Earlier 2026 releases as rivals
Any major franchise film released between January and November 2026 that posts an unusually strong 3-day opening becomes the benchmark Doomsday has to clear. Because the market has only just opened and swung between 38% and 100%, traders appear genuinely unsettled about how strong that early-year competition might be.
Thin, single-venue liquidity
With only Polymarket listing this market and $169,815 in total volume, the price is more exposed to individual large trades than markets with broader participation. That helps explain the wide 38%-to-100% range recorded in just the first observations.
The case for
- Avengers ensemble films have led their release year's domestic opening weekend in both of their prior instances, in 2018 and 2019.
- Doomsday is being marketed as the culmination of a decade-long Marvel storyline, which historically concentrates opening-weekend demand rather than spreading it across a longer run.
- A large returning cast pulled from across the Marvel and X-Men franchises broadens the film's built-in audience relative to a standalone release.
- The resolution only requires Doomsday's opening to beat every other individual 2026 release, not to break any absolute box office record.
The case against
- A full calendar year of 2026 releases, including major franchise sequels or family films opening earlier in the year, creates numerous chances for a rival to post a bigger 3-day figure before December.
- A crowded December release corridor, competing directly against other holiday-season tentpoles, can suppress even a highly anticipated film's opening relative to a less contested date.
- The market's own history — a swing from 100% down to as low as 38% within days of listing — shows real disagreement among traders about the outcome rather than settled confidence.
- Only finalized the-numbers.com figures count, so an early strong studio estimate for a rival film could later be revised down, or Doomsday's own figure revised, changing the comparison after initial headlines.