The King of Fighters XIV publisher in Europe, Deep Silver, released two free PlayStation 4 that are currently exclusive to Europe, featuring Team South America for one and Team Fatal Fury for the other. [Thanks, DualShockers.]
The two themes feature static images for your PlayStation 4 home screen, along with their own custom music, sound effects, and icons.
The King of Fighters XIV is available on PlayStation 4. The two PS4 themes have yet to be announced for North America, but we may hear something about it in the near future. In the meantime, you can download the themes using a European PSN account as a primary.