The official website for Persona 4 Arena Ultimax has been updated with a DLC page—consisting of a guide to obtain the numerous DLC for the game—as well as an update to the character page which added command lists for every character.
As reported previously, Marie will be available on September 11th while Margaret will be available on September 25th. Additionally, for those who do not obtain Adachi by purchasing the game, he will be available on September 4th.
— p-ch