Comparing SH on Wii to SH on the 360, I don't see how people can say it bombed unless they also say it bombed on the 360 and PS3 too.
FF is a bit of disappointment (really short for a FF game) and hard to locate and came at a bad time of year especially when no stock in stores.
It's a little early for both games to say for certain, but I seriously doubt that SH for the wii will be considered a flop when it's all said and done.