It's been revealed The Pokémon Company will be making announcements about its existing games and projects, in the run-up to Pokémon Day on February 27. Pokémon Day marks the anniversary of the release of Pokémon Red and Green in Japan, and it has since turned into a major event for the franchise.
Nintendo fans have noticed that Pokémon content generally doesn't appear during Nintendo Directs. This is because The Pokémon Company holds its own Pokémon Directs and special events throughout the year, which include mobile titles and multimedia projects.
— ポケモン公式ツイッター February 21, 2022 With news on Pokémon Sword and Shield, Pokémon Cafe ReMix, Pokémon Unite, the Pokémon 25th anniversary celebrations, and Pokémon GO, it's up for speculation as to what might be revealed. It's likely that the Pokémon Unite announcement will involve a new character, while Pokémon Sword and Shield could add a special Mystery Gift to the game.
It's notable that there are no announcements regarding Pokémon Brilliant Diamond and Shining Pearl or Pokémon Legends: Arceus on the list. This suggests there may be news regarding these in the Pokémon Day event, assuming there's another Pokémon Direct coming. There is evidence to suggest that Pokémon Legends: Arceus will receive DLC, while Pokémon BDSP could receive a Pokémon Platinum-style expansion.