The date you can put in your diary


Avengers Secret Wars is set to open in cinemas on December 17, 2027. That date has moved more than once, so treat it as the current plan from Marvel, not as a date carved in stone. Studios shift big films when post work or a linked film needs more room, and this one is linked to a lot of other films. The film follows Avengers Doomsday, which is set for December 18, 2026. That gap matters. Doomsday has to land its story first, and Secret Wars has to pick up the pieces. If you have followed the Marvel films for years, you know how much weight that second film will carry. It is meant to close the Multiverse Saga. Anthony and Joe Russo are directing both films. They directed Avengers Infinity War and Avengers Endgame, so Marvel is going back to the team that handled its last two-part ending. Stephen McFeely is writing, with Michael Waldron also reported to have worked on the story. That mix gives the film a clear link to past Marvel hits.

Who is back, and who is reported


Robert Downey Jr. is set to play Doctor Doom. That casting was announced at San Diego Comic-Con in 2024, and it still shapes every talk about this film. Downey Jr. played Iron Man for more than a decade, so seeing him as Doom will feel strange at first. That is part of the point. Marvel wants fans to talk, and this casting does that job. The Fantastic Four are also set to play a part. That means Pedro Pascal as Reed Richards, Vanessa Kirby as Sue Storm, Joseph Quinn as Johnny Storm, and Ebon Moss-Bachrach as Ben Grimm. Their film work in the Marvel universe is still fresh, and Secret Wars looks like the place where their story meets the wider team. Other names reported in the cast lists include Chris Evans, Chris Hemsworth, Anthony Mackie, Benedict Cumberbatch, Paul Bettany, Letitia Wright, Simu Liu, Florence Pugh, Sebastian Stan, and Hayley Atwell. Some of these are listed as confirmed or semi-confirmed in trade and fan guides, while others are still rumoured. Read any full cast list with care until Marvel posts it itself.

The new face to watch


In September 2026, reports said Noah Jupe had joined Secret Wars in a key role. Marvel has not said who he plays. Online talk has linked him to an older Franklin Richards, the son of Reed Richards and Sue Storm, but that is a rumour, not a confirmed fact. Jupe is known from A Quiet Place, and he brings a quiet, sharp screen presence to any role he takes. That kind of mystery casting is now normal for Marvel. The studio holds back names and roles to keep the first trailer fresh. It also means fans fill the gaps with guesses. Some guesses will be right. Many will be wrong. The safe way to read them is to treat them as talk until a trailer or a Marvel post proves them. Anthony Mackie has also talked about his own schedule in a way that raised questions. Reports in October 2026 said his Broadway run as Macbeth ends in July 2027, and he said he would then finish his Avengers work for Secret Wars. That timing has led to talk about how large his role is, but no one at Marvel has confirmed a change to his part.

What the story could do


Marvel boss Kevin Feige has said Secret Wars will work as a soft reboot inside the Marvel timeline. That phrase matters. It suggests the film can reset parts of the story while keeping the history fans know. It does not mean every past film is wiped out. It means the next phase can start with a cleaner slate. In the comics, Secret Wars is a huge event where worlds collide and heroes from different realities meet. The film version will not copy the comic page by page. It will borrow the scale and the idea of a clash between worlds. That is why so many characters from different Marvel corners are linked to it. One report in late October 2026 shared claimed script descriptions for a Tony Stark variant, Steve Rogers, and Wolverine. Those details came from an online scooper, not from Marvel, so treat them as unconfirmed. They show the kind of wild swings fans expect from this film, but they are not proof of what is on screen.

Why this date is a fight for screens


December 17, 2027 is a crowded day. The Lord of the Rings The Hunt for Gollum is also set for that date, based on current listings. Two huge films on one day will fight for the best screens, and IMAX screens in particular. IMAX chief Rich Gelfond has said Secret Wars is set to play on IMAX screens in 2027, which is good news for Marvel fans who want the biggest format. That clash may still change. Studios often move one film by a week to avoid a head-on clash. For now, both films hold the same date, and fans who want to see both should plan for two trips. If one moves, the other gets a clearer run, and the box office talk will shift fast. For now, the best plan is simple. Mark December 17, 2027, watch Doomsday in December 2026, and wait for Marvel to drop the first real trailer. When that trailer lands, we will know far more than any rumour list can tell us. Until then, keep the confirmed facts separate from the talk, and enjoy the build-up.

Sources and reporting

  1. GamesRadar — 2026 · Verifies the December 17, 2027 date, the Russo brothers as directors, and the September 2026 Noah Jupe casting report
  2. ComicBookMovie — 2026 · Verifies the IMAX plan for Secret Wars and the same-day clash with The Hunt for Gollum
  3. ComingSoon — 5 Oct 2026 · Verifies the Anthony Mackie Broadway timing and his comment about finishing Avengers work after July 2027