Japanese release date: June 14th. It'll cost ¥7,329 ($92) for the standard edition and ¥10,290 ($129) for the Famitsu DX pack which includes:
Six clear posters with illustrations from Madhouse, Studio Hibari (Persona 4 cutscene creators), Hiroyuki Maeda, Shuji Sogabe (Persona 3 manga artist), and Shigenori Soejima plus 10 postcards and a pouch shaped like Marie’s bag.
Additional information coming from this week's Famitsu is that players will be able to build their own gardens, taking care of plants and such. Famitsu apparently also has some info on the game's new opening, new winter clothing for the characters and the third tier of evolved Personas, so I'll be updating this thread when that information becomes known.
So P4G has fishing, gardening, building relationships, visiting other towns, various seasons with accompanying events, side quests helping fellow Inaba residents... all it needs is the option to rent your own apartment and buy furniture for it and we have Animal Crossing.