Okay, look. Netflix is lying to you. Netflix keeps calling things that are absolutely not anime "anime". Please scroll down if you would like my full rant on this topic. For now, though, the thing you're here to learn about is the new animated Witcher film, following up on The Witcher: Nightmare of the Wolf. The next movie was briefly announced months ago, but it's still a long way off.
Producer Lauren Schmidt Hissrich tells Entertainment Weekly that the film "way, way, way in the future", and there's no clear release date, even internally, because "we're just now getting started on it". As for the direction of the film, however, Hissrich says that "I hope that the anime [sic] is a little bit more of a standalone project that will bring new eyes onto the franchise but also really be able to stand out there on its own". The movie will be written by a pair of writers who have "been on the staff from the beginning".
Nightmare of the Wolf was produced by Studio Mir, the South Korean animation house responsible for such excellent productions as The Legend of Korra and Netflix's own Voltron series. It's a great studio. It does not make anime.
RELATED LINKS:
Netflix's Witcher Season 2 debuts a new trailer full of beasts and battles
Witcher 3 modder fixes the game's grammer and speling
The Witcher 3's ray tracing update has been delayed