Originally announced during the latest episode of Persona Stalker Club, Atlus will be having an hour long TGS presentation on September 20th, from 2:30 PM to 3:30 PM JST, according to the recent Sega stage event schedule.
The Persona Stalker Club hosts Mafia Kajita (writer) and Tomomi Isomura (voice actor) will be present, and so far Etrian Odyssey II Untold has been confirmed to be present.
The Sega event will be streamed via Niconico.
— Sega TGS