To commemorate 25 years of the anime, a special episode called Pocket Monsters The Distant Blue Sky (ポケットモンスター 遥かなる⻘い空 ) is set to air on December 23rd, 2022 on TV Tokyo. The same production team from 1997 will be involved.

Summary:

Satoshi and Pikachu continue their journey to become Pokémon Master. Satoshi has promised to meet his mother Hanako in Tonari Town, but Pikachu gets abducted by the Rocket Gang on the way, and as Satoshi seraches for it, he runs into a mysterious boy named Haruto. This is the story of one of Satoshi and Pikachu's encounters on their adventure.

Staff:

Director: Kunihiko Yuyama (湯山邦彦)
Screenplay: Shōji Yonemura (米村正二)
Character Design: Sayuri Ichiishi (一石小百合)
Character Design: Shuhei Yasuda (安田周平)
Music: Shinji Miyazaki (宮崎慎ニ)
Animation: OLM

YouTube Clip - Pocket Monsters: The Distant Blue Sky Trailer

Source: https://www.tv-tokyo.co.jp/anime/pocketmonster/news/index.html#231988
Source: https://twitter.com/anipoke_PR/status/1603697694253678592