UPDATE: A Press Release from Bandai Namco Europe has now been added to this piece!
The Pre-order page for Tekken 7 in Japan went up on PlayStation Network went up today and with that came further details on the Season Pass for Tekken 7. If you get the Deluxe Edition of Tekken 7, the Season Pass included will come with 3 DLC packs that are coming throughout this year and early next year. The source of all the details is in Japanese but I've translated them into English all below!
PlayStation Japan ≫ https://www.jp.playstation.com/blog/detail/4721/20170316-tekken7.html