Arc System Works just announced that a new balance update for the arcade version of Persona 4 The Ultimax Ultra Suplex Hold (known stateside as Persona 4 Arena Ultimax) is planned for release in January.
This update will bring the current console-only characters to arcades, as well a full set of balance changes for the entire cast and other adjustments to the system mechanics.
Not much is known about what will be different after the upcoming patch, but Dengeki Online is reporting that Shadow Type characters will have a full change to their specialization. An accompanying screenshot shows Shadow Ken with a differently stylized Burst icon, which they do not have access to in the current version.
Location tests will be held November 21-24 at venues all across Japan, so stay tuned for more information.