During EVO 2019 it was revealed that SoulCalibur VI would be getting another season pass. In the two minute trailer, it was revealed that this pass would include four new guest characters. The first of which would be the Samurai from Samurai Shodown.
Judging by the info cards it seems like you’ll also get access to the 4 characters clothing for your created character. This update will include new systems, but there weren’t any specifics on what that meant. No release date either. Just another coming soon. Check it out for yourself.