Before the DC Universe became the mess it's now infamous as, the assumption was that Affleck would star and direct a Batman movie.

Source: https://www.slashfilm.com/1334308/why-ben-affleck-chose-deathstroke-canceled-batman-film/

Despite being over a decade since his last Batman movie, WB has yet to produce anything non-Batman related that comes close to his trilogy.

Source: https://comicbookmovie.com/batman/the-batman/the-dark-knight-director-christopher-nolan-reveals-why-he-wont-publicly-share-his-thoughts-on-the-batman-a207705

Still, the movie does engage with Gotham's world and connects to the video games, so it qualifies as a Batman movie, even if only tangentially.

Source: https://www.cbr.com/batman-animated-films-best-worst/