Jason Voorhees DLC was released at Midnight around the world for both the PS4 and Xbox One. Xbox One customers are currently happily playing as the new character via the Kombat Pack download, the PS4 players on the other hand not so much.
The DLC character either doesn’t show up at all in the character selection screen or is blanked out, and is not able to be chosen. Many players wanting to play as Jason on the PS4 are not too happy about this, but a work around has been found for partial use of Jason on the PS4 meaning the content is there to play but a glitch has caused the character to not be able to be chosen at the character select screen.
We assume there will be a fix later today so all PS4 players can join in on the Jason Voorhees fun!
Here is the quick fix for Jason PS4 DLC for now. http://thisgengaming.com/2015/05/05/mortal-kombat-x-jason-dlc-fix-ps4/