Atlus USA has revealed that they are planning on releasing Persona 4 Arena Ultimax for the Xbox 360 and PlayStation 3 in North America on September 30th. As previously announced, those who pre-order the game will be given an inflatable bop bag that looks like Teddie as well as a set of Tarot cards.
It is also worth noting that for one week after release, both Marie and Adachi will be available as free character DLC. After that they will cost a yet unannounced price. Currently it is unknown if the recently revealed Margaret will be given the same treatment.