E3 rumors: Nintendo's Acid Ghost is like Hitman, but with haunting instead of killing. And on a boat

So, the Wii U's Acid Ghost then (unofficially official pronunciation: Aciiid Ghoooooooooost!). A supposed new IP, supposedly set for reveal at E3. Supposedly aimed at a mature audience and supposedly to be unveiled via a video starring Emin-bloody-em. But what the hell is it? I made a few strong guesses of varying degrees of plausibility yesterday. But now we have some more (supposedly) solid details