I don't see it.
It's a great looking game, who'd cancel their pre-order? And, if Nintendo sees pre-orders low for THE wii game of the year, they'd see it as a shrinking fanbase, bring out fewer games and rush out Wii U. No-one wants that to happen...
If they aren't coming, as sad as it is, they aren't coming. If what we've done so far hasn't impacted their decision. So don't sabotage this great game, please.