If haven't played Catherine and you love puzzle games, I suggest that you check it out right away. It is such a fantastic game. It's currently available on PS Now and via backwards compatibility on the Xbox One.
Catherine was also made by Atlus makers of the Persona series and it looks like there is going to be some kind of cross over with Persona 5. Atlus has announced that Catherine themed costume DLC will be available in Persona 5 as Ann becomes the titular character Catherine herself, the Protagonist becomes Vincent, and Morgana becomes one of the stray sheep.
The music that is playing during this video is also music from the game Catherine as well so maybe this DLC will also come with a bonus BGM track to use in dungeons. No other info about the DLC has been made available such as how much it will cost or when it will be available
Persona 5 launches on PS3 and PS4 on April 4th.