There were a batch of free themes that were made available recently, but there are still more themes coming in. We now get access to the Psychic Girl, Mai Shiranui and Mexican Fighters themes, which were initially only available in PlayStation Network stores outside of the US.
In addition to these, we also got a pretty slick Samurai Showdown VI theme a few days back, going nicely along with the recent port of that title to PS4. All of these themes are free, bringing the total free King of Fighters XIV themes up to 13; be sure to snap them all up while they’re available.
Source: PlayStation Network