Probably not. 2D Marios and 3D Marios do not necessarily appeal to the same consumer, and Nintendo will maximize profits by continuing to wow people with both. Remember: return on investment isn't the most important number here, and both crowds need to be catered to in order to maximize profits!
I expect a full-out revolution for 3D Mario in the next generation, though. Galaxy is awesome, but I think they really want to sell more than it's doing now - perhaps they want it to beat out Super Mario 64?







