Atlus announced today an early March release time frame for Persona 4 The Ultimate in Mayonaka Arena. The arcade game was originally announced with a general Spring timeframe.
The Ultimate in Mayonaka Arena is a fighting game from Atlus and Arc System Works. Although it's based off Persona 4, it has characters from both Persona 4 and Persona 3.
In addition to the arcade release, a release on PS3 and Xbox 360 is planned for Summer.