Anyone could use a pitch shifter on a Japanese friend's speech and pair it with sketches from your Deviantart Scraps folder. Hell, even I could honestly make a video like this. There's not much to it, considering the amount of titles that have also been "leaked" by "Random Nintendo Employees" in similar vids by other fanboys.
This shouldn'tve even been discussed, if you ask me. (In a serious manner anyway. If it was brought up just to point and laugh at it, that's slightly better.)
Pretty much.