> Demon Slayer: The Movie
>A completely original story, separate from the manga
>The enemy is the former Upper Moon Zero
>A demon who, like Tamayo, escaped Muzan’s control
>A traitor who used to be part of the Demon Slayer Corps, and a user of the Dark Breathing style
>An original movie-only heroine appears
Includes rom-com moments with Tanjiro
>To defeat Upper Moon Zero, Tanjiro and Akaza temporarily team up
>In the end, Tanjiro defeats Upper Moon Zero using a movie-exclusive technique that fuses Water Breathing and the Hinokami Kagura

Honestly, I would have loved to enjoy Kimetsu as one of those old-school anything-goes Jump anime movies like this.
I like canon films, but it’s a bit sad that there’s no original movie you can go into completely blind and enjoy without knowing the story beforehand.