https://deadline.com/2021/06/lord-of...ne-1234773024/

"New Line Cinema and Warner Bros. Animation have announced they are developing an anime feature film called The War of the Rohirrim. Directed by Kenji Kamiyama, it will be set over 250 years before the main events of The Lord of the Rings during the tumultuous reign of Helm Hammerhand, the legendary King of Rohan."