Officially, through PlayStation Blog, regarding the added content that will be distributed for Nioh 2. Team Ninja also decided to publish one with that announcement Story Trailer dedicated to the title.
I DLC in question will be three, or at least the main ones will be. They will somehow make up some sort of prequel than what will be narrated within Nioh 2, will allow you to meet new characters and obtaining new equipment. They will also require a good number of hours to complete.
Finally, a will be available at launch Season Pass which will allow access to additional content. Team Ninja he guaranteed weekly updates until the day of the release, set for March 13 2020.