TheBigFatJ on 16 July 2007
I don't think any unbundled retail release game will surpass the 40 million sales this decade or next. The game would have to be bundled with hardware for at least part of a console's life.
Wii sports, interestingly enough, has a reasonable chance at breaking SMB's record if it continues to sell as well as it has been and is bundled for a long time.
