Super Mario Galaxy 2 sales: Yay or Nay?

[09tarheel]

I thought after NSMB Wii SMG2 would really struggle as people would already have there Mario fix. I was thinking 5 million lifetime maybe. But it seems like it may be able to get to 5 million by the end of the year. I think if the game could get to 6.5 million or so total that would be fantastic.