Netflix and Riot Games have announced Arcane, the first League of Legends animated series, will be released in Fall 2021. Arcane will be developed and produced by Riot Games with Fortiche Productions. Fortiche Productions has worked on past League of Legends cinematics including Get Jinxed and POP/STARS.
Arcane is described as:
Set in the utopian region of Piltover and the oppressed underground of Zaun, the story follows the origins of two iconic League champions-and the power that will tear them apart.
Source: press release