Smash Bros Wii U Mario vs Bowser

Nintendo have stood firm in light of the recent video claiming to be a leak from Super Smash Bros. for Nintendo 3DS. After understandably claiming copyright infringement on the uploaded videos showing footage from the upcoming title with three otherwise unannounced characters as the focus – followed by their subsequent removal – Nintendo had this to say:

"We have nothing to announce at this time. For the list of announced playable characters for Super Smash Bros. for Wii U and Nintendo 3DS please visit:"

Nintendo is very serious about any potentially leaked information, so it comes as no surprise that they are treating this footage in the way that they are.

What are your thoughts on the recent developments? Do you think we could see an admission from Sakurai, or is this just admittedly clever hogwash thrown together for attention?