Here's what we know: there will be DLC for the revamped Wii Samba de Amigo, and as of right now, we know what the first downloadable pack will be:
"I Want Candy" -- Bow Wow Wow
"Are You Gonna Be My Girl?" -- Jet
"Mambo Mambo" -- Lou Bega
Here's what we don't know: what it will cost. But this first download pack is supposed to be available when the game launches.
[Via press release]