After months of watching the same countdown and a long, hard 30 hour livestream filled with dancing, J-pop, epic ruses, endless moon speak, 8888888888888888, delays, more dancing, and Teddie never shutting his trap, Atlus have finally released the new trailer for Persona 5 at the end of the Persona concert.
Along with a poster displaying the protagonist and what is most likely his persona.
Unfortunately they did not reveal a more specific release date, simply showing '2015'.
Update: http://www.siliconera.com/2015/02/05/exclusive-persona-5-blu-ray-included-first-print-copies-persona-4-dancing-night/
First run copies of P4: Dancing All Night will contain a blu-ray with Persona 5 content. Considering P4
aN releases June 25 we can expect P5 to be released sometime afterwards.
Update 2: Some words from P5 director Katsura Hashino.
http://www.siliconera.com/2015/02/05/persona-5-producer-shares-thoughts-trailer-characters/
Also, Famitsu will have info on P5 in their next issue.
http://www.famitsu.com/news/201502/05070855.html
Along with a poster displaying the protagonist and what is most likely his persona.

Unfortunately they did not reveal a more specific release date, simply showing '2015'.
Update: http://www.siliconera.com/2015/02/05/exclusive-persona-5-blu-ray-included-first-print-copies-persona-4-dancing-night/
First run copies of P4: Dancing All Night will contain a blu-ray with Persona 5 content. Considering P4
Update 2: Some words from P5 director Katsura Hashino.
http://www.siliconera.com/2015/02/05/persona-5-producer-shares-thoughts-trailer-characters/
Also, Famitsu will have info on P5 in their next issue.
http://www.famitsu.com/news/201502/05070855.html