There's virtually no chance of NSMB Wii surpassing NSMB DS. Here's a look at the numbers.
NSMB DS has a 2.44 million lead on NSMB Wii.
In 2012, NSMB Wii sold 1.9 million, and NSMB DS sold 1.1 million.
NSMB Wii's sales have been as follows. 2009: 10 million, 2010: 10 million, 2011: 3.7 million and 2012: 1.9 million. If 2013 is half of 2012, and 2014 is half of 2013, then NSMB Wii is going to sell roughly 2 million more through its life. It's going to need to do very well to sell more than 2.5 million more. But that isn't enough, because NSMB DS is likely to sell at least a million more. That means NSMB Wii would have to sell at least 3.5 million more, which simply isn't going to happen.