The project was a film called Sword Art Online the Movie -Progressive- Aria of a Starless Night.
With the end of Sword Art Online: Alicization – War of Underworld previously, it concluded by making sure we know there’s more coming. And that’s in the form of the Sword Art Online: Progressive, which is basically a retelling in a cleaned-up fashion of the original story.
Sword Art Online: Progressive is a new version of the Sword Art Online tale that starts at the beginning of Kirito and Asuna’s epic adventure–on the very first level of the deadly world of Aincrad!
With the film seeing its October 30th, 2021 release in Japan, we’re now seeing some streaming distribution for it.