Update (2018-08-17): Atlus has published the news post for this trailer, which includes an update to the official website’s character page adding the P3 protagonist, the P3P protagonist, and Junpei Iori.
Atlus has released the first character trailer for Persona Q2: New Cinema Labyrinth, featuring Junpei Iori from Persona 3 (voiced by Kousuke Toriumi).
This is the first in a series of character trailers, which will presumably feature the 28 playable Persona characters in the game. The character page can be found on the official Japanese website.
Details about the story, gameplay, and development of Persona Q2 can be read in a previous post.
Persona Q2: New Cinema Labyrinth has been announced for a Nintendo 3DS release in Japan on November 29, 2018.