The Season Pass Guarantee allows players to receive Xbox 360 season pass content on Xbox One for free, if they own the game on both consoles. Microsoft announced the program today, noting that EA, Activision and Ubisoft have signed up for the program. Call of Duty: Ghosts and Battlefield 4 will include the Season Pass Guarantee.
Activision and EA revealed earlier today that Ghosts and BF4, respectively, will be able to share season pass content from current-gen to next-gen systems – including from Playstation 3 to Playstation 4. There's no word if Playstation has a similar first-party season pass system in the works.