Didn't really follow Batman at the time, but I'll watch it if I'm snowed in this winter.
https://bloody-disgusting.com/movie/3957148/batman-knightfall-trailer-a-brand-new-rated-r-animated-movie-trilogy-event/ (https://bloody-disgusting.com/movie/3957148/batman-knightfall-trailer-a-brand-new-rated-r-animated-movie-trilogy-event/)