Fresh off of the Japanese release of Shin Megami Tensei IV, it’s been confirmed via NeoGAF that Index Corp., the parent company of Atlus, had registered persona5.jp. Currently the domain leads to the domain registrar’s site, Onamae (think Japanese GoDaddy in terms of function). However when you pass the domain through a whois, The registrant is Index Corp. The last game in this Megaten sub-series, Persona 4, released in 2008. The Vita version, Persona 4 Golden, was released in late 2012.
The Persona team tested the waters of making games on HD consoles with Catherine, a puzzler that followed the exploits of Vincent and his fear of being unfaithful to his fiance. Following the successful release of Catherine, it was said that the team began work on the next Persona game, but not much was heard since.