Regarding Persona news I would highly recommend getting your information from
http://personacentral.com/ , they keep up to date with upcoming Atlus streams among other things.
Recently there was a stream called the "Take the Treasure" live stream; here's a skinny on what was shown - the full intro is out, featuring previously shown animation along with new animation to showcase the new characters:
https://youtu.be/lswcZg7BH2M , a Manga series is announced for September 15, 2016 and Persona 5: The Animation airs September 3, 2016. The new characters were shown a bit more in-depth along with a sidequest during a gameplay showing, and interviews with some staff were shown. There is a concert announced most likely featuring music from the Persona series (this is the second one, I believe you can watch clips from the first one if you own P4G) and there is a festival as well. Commercials will start airing in Japan and perhaps other regions will start getting commercials eventually, and there is a Tokyo Game Show event announced for September 15, 2016. Lastly, if you like Futuba Sakura, the orange haired girl, a headphone company intends on creating a model based off of the ones she wears. If you would like to know more about what was announced you can probably still rewatch the stream, or simply read the articles on the aforementioned website.