We are aware of some players upgrading to Playstation 4 are unable to obtain their DLC. Playstation is currently working on it. In the mean time, please try the following suggestion that a fellow community member suggested and let us know if that helps!
1) On the PS4 menu screen go to COD Ghosts
2) Then got to RELATED ITEMS.
3) See if you can see the TEAM LEADER ADD-ON
4) if you can then choose it and download it.
5) Once it is downloaded the Season Pass should also download to the PS4.