Atlus USA have shared two Persona 4 Arena Ultimax videos that go over some of the major changes made in this version of the game.
Part 1 covers Yu Narukami, Yosuke, Sho Minazuki and Mitsuru. You can watch it below:
Part 2 covers Yukiko, Yukari and Shadow Narukami:
Persona 4 Arena Ultimax will be available in North America this Fall.