Demon Slayer films will be released in 2025, meaning that the heart-racing finale is not too far off.

The Infinity Castle and Sunrise Countdown arcs are two of the most popular in the Demon Slayer manga, filled with the most action-packed fight scenes, tragic deaths, and, of course, the pivotal final fight against Lord Muzan and his Twelve Kizuki demons that will determine the fate of humanity. In order for these films to meet fans' understandably high expectations, they must include one element that may seem unexpected, or even unnecessary: filler.

Demon Slayer’s Infinity Castle Films Need Filler Content To Be Truly Great

Without Filler, It Would Be Very Difficult To Stretch the Finale Out for Three Feature-Length Films

Tanjiro falling into the Infinity Castle

Filler content has a bad reputation among many anime lovers, sometimes viewed as an unwanted distraction from the more interesting parts of the story. However, filler can offer positive benefits too, such as expanding on character arcs, adding humor to otherwise grim moments, and providing breaks between battles so they do not become monotonous. In Demon Slayer's case, the Infinity Castle films have been rumored to contain filler. Considering the first film will likely have a 90-minute runtime, similar to past movies in the franchise, this filler content will be absolutely necessary for the films to have proper pacing.

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The Infinity Castle arc itself spans chapters 140-183, and the following Sunrise Countdown arc, which is the finale of the manga, spans chapters 184-205. Altogether, this is over 60 chapters of manga, which is quite lengthy, but filler will still be required between the fights in the movies. Since there will be three Infinity Castle films, likely 90 minutes each, if the movies only included manga scenes, like major fights, there would not be enough material to work with. Not only will filler extend the conclusion long enough to last for three movies, it will further develop characters and build tension for the big fights.

Filler Will Provide Additional Backstory and Improve the Manga’s Most Pivotal Fights

Shinobu’s Battle With the Demon, Doma, Can Become Even More High-Stakes Thanks To These Added Scenes

Shinobu falling into the Infinity Castle

The first film in the trilogy will start the conflict between humanity and demons in dramatic fashion, featuring Shinobu and Doma's momentous showdown. This battle is one of the most anticipated by manga readers, not only because of the impressive swordsmanship by Shinobu, Inosuke, and Kanao, and the chilling Blood Demon Art techniques used by Doma, but because of the emotional backstory surrounding the clash. Filler content could be a seamless way to delve deeper into Shinobu, Kanao, and Inosuke's respective pasts, explaining why they are so enraged at the Upper Rank Two demon, and what he took from each of them.

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Additionally, filler content in the Infinity Castle films, particularly during Shinobu's major fight, will only increase the high-stakes of the battle. In the manga, fights often conclude pretty quickly, taking up only a few pages of space, but in a film format, this straightforward way of handling battles would feel far too rushed. By interspersing new content throughout the scenes of the fight, it will last longer, and fans will grow more invested in the outcome. Since the filler will also likely be never before seen content, manga readers already familiar with the arc will be able to enjoy new surprises.

Past Demon Slayer Films Made Anime History, and Infinity Castle Is Next in Line

Filler May Be the Key to the Infinity Castle Trilogy Living up to Anime Executives' Optimistic Predictions

Some Demon Slayer films include recap scenes from previous anime seasons, which is another helpful way to break up major fights and jog viewers' memories before moving on in the story. However, for the Infinity Castle films, it seems like the better option is for these movies to include all-new, exciting content that anime viewers have never witnessed before, as well as new filler that will shock even manga readers. This way, everyone who goes to see Demon Slayer's Infinity Castle trilogy will see at least a few completely unexpected and fresh scenes, increasing everyone's anticipation for the trilogy even more.

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According to hopeful predictions by anime executives, Demon Slayer's Infinity Castle trilogy will change the box office, so it is crucial that these films achieve incredible success among viewers. Past theatrical films in the Demon Slayer franchise, namely Mugen Train, made anime history, so it seems likely that the Infinity Castle trilogy will receive a similar positive reception among audiences. Including filler is the key to ensuring that all three films have believable, perfect pacing, and that the Demon Slayer manga's best moments are able to properly shine the way they deserve without rushing past too quickly.

Demon Slayer Kimetsu no Yaiba

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Demon Slayer: Kimetsu no Yaiba
Release Date
April 6, 2019
  • Cast Placeholder Image
    Natsuki Hanae
  • Cast Placeholder Image
    Zach Aguilar

WHERE TO WATCH

Streaming

Demon Slayer: Kimetsu no Yaiba follows Tanjiro Kamado, a young boy who becomes a demon slayer after his family is slaughtered and his sister Nezuko is turned into a demon. Tanjiro embarks on a perilous journey to find a cure for his sister and avenge his family, facing numerous demons and formidable opponents along the way. Set in Taisho-era Japan, the series combines intense combat sequences with intricate character development.

Main Genre
Animation
Seasons
5