Namco Bandai has announced some of what Tekken  7 DLC will be. The most important bit is we will be getting two characters from outside Franchises in the game. There was no announcement of who they will be. See the press release below ( orginized a bit)

• The first batch, to be released this Summer 2017, will provide a brand-new game mode and more than 50 new costumes.
• The second and third batches of content, to be released respectively this Winter 2017 and next Spring 2018, will both feature one exclusive playable guest character from other videogames’ licenses with, each time, a special stage and special costumes for these guest characters

This 3 post launch pieces of content will be purchasable individually but will also be available through the Season Pass that will grant to each buyers 35 exclusive metallic costumes.

 

Tekken 7 is set to release for the PlayStation 4, Xbox One, and PC on June 2nd. So make sure you get that.