What appears to be an Atlus teaser site has popped up:

http://p-atlus.jp/

Any guesses as to what this site is teasing?

Persona 4 Portable?
Persona 4 HD?
Persona 4 3D?
The Persona 4 FES that Atlus said it wasn't going to make?

My guess is P4 Portable for Vita.

same here.

Aaaaaaaand, it's official.

Not only are we getting a P4P on the Vita, but also a P3/P4 fighting game by the dudes behind Blazblue as well as hints of Persona 5.

Awesome.
Bring it on!