For Dragon Ball Z: Budokai Tenkaichi 3 the development team started from scratch and streamlined the controls. You don't have to hold down Z + B to input blast commands for special attacks anymore. When you press and hold down a direction on the remote's d-pad a figure pops up on the bottom left hand corner of the screen. The orange icon tells you the motion you need to make to do a special attack.
Loved DBZ Budokai Tenkaichi 2 so its only natural that I give this one a spin...
I look forwards to this game as well!