You've heard of Persona Q: Shadows of the Labyrinth, right? It's basically a chibi spinoff of the series, involving bits and pieces of Persona 3 and 4, and it's heading to the 3DS next year. Based on the initial reveal and this new trailer, it looks adorable.
The footage is looking great so far, provided that you're cool with the character designs (and the two new characters, Zen and Rei). In addition to the new footage an official site has opened up, promising more info in the future in addition to some character bios.
Persona Q [p-atlus.jp]