Don't let the screenies fool you. High Voltage Software went from promising 16 man PVP to 12 man PVP and went from deciding to use Wii motion plus to removing it. People are going to grind out as many numbers as they can to gain attention.
But those ideas came BEFORE they found a publisher. Remember the publishers set the deadlines and say, "we don't care if you need more time I need MORE money NOW!!!"
The good news is that The Grinder will use MotionPlus.