What would have sold most? 3D World, Galaxy 3, or a Mario 64 successor?

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Cloudman said:
 And Mario 64 would likely only appeal to old fans purely on nostalgia. Unless it was a re-imagining, it wouldn`t move much units either. 

I meant a modern sequel in the semi-open-world style of 64, not a remaster/re-imagining of 64.