Nope. Miyamoto said that making this game brought him happiness. If it flops, then Miyamoto will be sad. If he's sad, then he might lose inspiration. If he loses inspiration, then we'd all be sad.
Plus, as Zucas and coasterlove have stated, a lot of time and effort was put into this title. Why would poor sales make anyone happy unless they directly benefit from its failure (e.g. a competitor)?
Proud member of the Mega Mario Movement
Warrior of Light