It has Sonic in it. That's a pretty groovy addition. Furthermore, Ulala of Space Channel 5 fame is included. I am really enjoying SEGA's recent trend of pretending the Dreamcast was the most succesful console in existence, and including references to it in its newest games. First we had SEGA Superstars Tennis, which was filled with fan service, left, right and possibly even centre, and now we have Ulala in the new Samba De Amigo game. It's like it's all coming together (just pretend Sonic & The Black Knight doesn't exist).
Okay, I realise this entire post is a big cop out on my part, but it is basically to inform you that I have intentions to make an article at some point. In the mean time, here is a small teaser image;

You saw it here first, Sonic is encouraging middle aged Japanese men to spend their hard earned yen in a very noisy gambling arcade, whilst he rocks out on a guitar and so on.