The debut trailer for Shin Megami Tensei IV can be found within the August 30-due (in Japan) Devil Summoner: Soul Hackers. However, early buyers of the game have posted the first images of the trailer online. Details posted with the clip confirm the game is third-person (in the same style as Shin Megami Tensei: Nocturne), has a game map; features Hochu Otsuka and Miyuki Sawashiro in the voice cast, and will launch in 2013. Get the rest below.
Thanks, Hachima Kikou.
Update 10:18 a.m.: Here are some more images, courtesy of Game Jouhou: