Nintendo of America president Reggie Fils-Aime believes that New Super Mario Bros. will outsell the PlayStation 3 or Xbox 360 version of Modern Warfare 2.
When asked by GTTV whether Mario's latest could best Infinity Ward's FPS, Fils-Aime at first said;
"Well, Modern Warfare 2's on two platforms, right?"
When asked if it would beat one of the two console SKUs, he replied, "So, absolutely. I say unequivocally."
"On one particular platform? I do believe so."
"Now, you've got to give me the entire holiday selling season, right, so let's take it all the way through the January NPD data."
"Yes. I'll take that... I'll put that stake in the ground."

Source: gamesindustry