While ATLUS USA have been actively out promoting Persona 4 Arena this week, ATLUS in Japan have also released an additional trailer for the Japanese release (Known as Persona 4: The Ultimate in Mayonaka Arena) through Japanese gaming website Famitsu.com.
While the last few trailers we have seen focus on the battles for the Persona 4 main characters, this trailer focuses on the games story mode with quite a bit of focus on the three characters (Aigis, Mitsuru and Akihiko) from Persona 3.