Explosivo on 15 January 2008
I don't think SSBB will be out in Europe by then so... Maybe Zack and Wiki if it gets a prize reduction (and released).
Predictions for December 31st 2008:
Wii 38,000,000
DS 84,500,000
PS3 17,000,000
PSP 41,000,000
X360 23,000,000