Correct--in fact, I think I was the first to mention it.People have said that the music added was really fake. Supposedly, the katakana in that song title is for the SMW Title/Ending music.
It was a well-implemented fake, for sure, but a fake nonetheless.
And I wish that Nintendude were telling the truth. I'm sure it's all falsified, but it's a nice pipedream. Oh, Claus, someday you and I will make a great Smash team...