You could say a lot of the same about Japan Studio's IP in general though? The majority of their output was co-developed with outside studios.
Off the top of my head, you have
Level-5 (Dark Cloud 1-2, Rogue Galaxy, White Knight Story, Jeanne D'arc)
Cattle Call (Arc the Lad)
Matrix Software (Alundra IP)
Media.vision (Wild Arms)
Marvelous (Soul Sacrifice)
NanaOn-Sha (Parrappa The Rapper/Umjammer Lammy/Vib Ribbon)
Everybody's Golf (Clap Hanz, Camelot for the first game)
You even have several modern studios that splintered off from Playstation, such as Playrise Digital (former Psygnosis/Studio Liverpool), and Gen Design (former Team Ico/SOTC) that could potentially bring back other forgotten Playstation IP (such as WipeOut).
This move opens up a lot of doors all of a sudden!