When I first heard about the leak, I was beyond skeptical. I didn't know much about the Chorus Kids, but I knew one thing: They didn't have anything that could really work as a moveset. After Pacman got confirmed, I decided to look up information about the leak. It was there that I found out that Megaman, Villager, Wii Fit Trainer, Pacman, Palutena, and Miis (did I miss any?) had all been accurately predicted by the leaker. At that point, I was convinced. After seeing the spooky spirit in that Smash Run video, I started to think that they were already a character in the game and just hadn't been confirmed, and at this point I'm fairly certain that Sal has inside information about the game. Anyways, a rhythm-based fighter seems like a great idea, and looking at DK's "new" Final Smash, I can definitely see Sakurai putting in a character based entirely around that gimmick.
I'm definitely supporting this. Put me in the choir, even though I can't sing worth crap. I'll just play trumpet instead.