… Back in 2003, the Wachowskis created what remains to this day one of the most ambitious multimedia storytelling projects attempted in mainstream cinema: an interconnected universe of comic books, video games, and anime designed to be released and watched within and after the six-month release window between 2003’s The Matrix Reloaded and 2003’s The Matrix Revolutions.…
source:
https://www.polygon.com/23053371/animatrix-movie-analysis-where-to-watch-streaming