I think the issue is just NSMB.
A game built around mechanics from the (S)NES days isn't much of a system seller for next-gen hardware in 2012/13. A 3D Mario would've been better, as it would be a bigger draw for people who aren't diehard Mario or 2D platforming fans.
Have some time to kill? Read my shitty games blog. http://www.pixlbit.com/blogs/586/gigantor21
:D