SNK has shared some insight into Season Pass 3 for Samurai Shodown. We now know that both Cham Cham and Hibiki Takane will join the roster, with Cham Cham due out mid-March, and Hibiki coming at a later date with two other characters. The addition of Cham Cham will also usher in a battle system update.
When asked why these characters are being included, Director Hayato Konya said Hibiki was included due to a desire to feature more SNK IP. For those who don't know, Hibiki is from The Last Blade. As for Cham Cham's inclusion, Konya said fans had been requesting the character, so they made the move to include her.
As for the updated battle system, there will be a new Guard Crush mechanic added. Along with that, the game will be re-balanced, and new tweaks will prevent weapons from disappearing off-stage.