The next numbered Persona game, Persona 5, has been officially confirmed for North American release by Atlus. Get ready to be chained to your chair and PS3 some time in 2015.
I wish we could tell you more. You don't know how...
Would you look at that! An Atlus USA site for Persona 5.
It says it's coming in 2015 for PS3.
The linked (and private) teaser trailer doesn't tease much.