I thought it was going to premier in August. Anyway, from the trailer and bits I've seen, it looks like Naoto Shirogane is absent for the time being. Hopefully she'll emerge in the second season of it since she was a personal favorite. It is also cool to see non-major character have a role too like the miscellaneous Social Links outside of your party members and family.
Although what does suck is that I've played the game so I know how it will end...which will make it all the more tempting when people start speculating who the true villain is.
Really cool that they are getting the people who do the music for all of the other Atlus games to do the OP and ED for the P4 anime. Very smart of them.
edit: Ahem, all caps is worst caps therefore let me rephrase.
I look forward to this anime production based on a video game that I found very intriguing, perhaps the anime won't be very good, I probably won't even watch it. I'd rather just play the game once I get my hands on it.
Also, this is my least favorite of the trailers released thus far, too much j poppy weirdness and... yeah not really my style.