@ Horsetail
IGN would be perfect for this, because they get all kinds of e-mail interviews with Sakurai, including a few they have done since Sakurai began developing Smash Wii U and 3DS.
@ SSBF
I agree. We need to ask them questions. Or perhaps we need to get a tweet from someone in a foreign language twitter area to see if this is really true.
Edit: By asking questions, let's no make this an Inquisition. Let's not go like "zOMG FAKES!" Let's just ask them a few questions, and be casual about it.
Remember, people called the 39 character Brawl roster "fake" because Ness and ROB had been "deconfirmed." Don't jump ship (either way) just yet.
Plus if we do get a IGN or major gaming outlet interview with Sakurai, we will hear about this. And if he confirms or deconfirms it, there you go.