Worldwide AC will probably win, it's massive in Japan, the others are not. AC sold 3 million on the Gamecube and 10 million on DS so is a big series.
Gears2 will end up second and should reach 3 miilion before years end
Fable 2 should go neck on neck with Resistance 2
LBP a little bit behind that.
Wii Music last.
Consoles (WW) Wii >>>> 360 > PS3