The Persona brand is arguably the strongest brand from Atlus and their parent company Index Corporation. While we haven’t seen a brand new Persona title for a couple of years, the Persona team went on to develop the unique block climbing game Catherine.
It looks as though Index could be taking the Persona team and giving them their own studio. A trademark for “P Studio” and a logo was discovered by Siliconera in Japan’s trademark database.
Index filed the trademark for use with video games and online games so we can rule out their animation department.
Update: Siliconera reader, Combo, points out that the P Studio logo is on the back of the Persona 4: Arena box. That confirms that the studio is indeed connected to the Persona games and that it’s been around for a while now.