If you're on the Atlus newsletter, you just received an email that probably made your thoughts immediately jump to a Persona 5 reveal. No "guess which game this is" teasing, no hints, just a blank page with the text "Stay Tuned." Atlus wouldn't tease anything like this except for a Persona 5 reveal, would they? They wouldn't care about waiting til E3, when they can speak so directly to all their fans, right?
Any speculation on what this is? As much as I'm trying to temper expectations, especially after all that teasing they did about their last two announcements, I really can't think of what else this could be. We knew a reveal was coming soon. My guess is a Japanese release in the winter next year, with a western release in the spring.