Atlus has launched a 30th anniversary website for the Persona franchise, and the first update, which will presumably bring more news about the series, is due next week.
Right now, the website is pretty barebones; it simply shows artwork depicting some of the franchise's most iconic characters, including the protagonists of Persona 3, 4, and 5, as well as a banner promising an update on January 8th.
What we'll learn on that date remains to be seen, of course, although if I were a betting man, I'd expect more information about (and perhaps a release date for) the upcoming Persona 4 Revival. Perhaps we can even expect Yuri Lowenthal to leak this one as well! (We love you, Yuri.)
The one thing I wouldn't hold your breath for when it comes to this website is an announcement for Persona 6. Atlus is busy with the aforementioned Persona 4 remake, and the studio is also still celebrating the success of its latest RPG Metaphor: ReFantazio (although that, admittedly, is made by the newly-formed Studio Zero).
With that said, Atlus has said that it doesn't currently have plans to expand Metaphor: ReFantazio into a series, so it's possible that...
