Watch Dogs is gonna flop on Wii U and Just Dance is a declining franchise that will probably be irrelevant soon like Guitar Hero. I don't see this ending well.
Nintendo fanbase really doesn't allign with Ubi Soft's target demo for things like Watch Dogs and Assassins' Creed anyway, that audience is all owned by Sony and MS.
But when things like Rayman aren't selling that great either ... I dunno. Maybe the Wii U is just a Nintendo enthusiasts machine for Nintendo games and not a whole lot else. And even there, not all Nintendo games are selling great ... DKC isn't doing that well, Wonderful 101 flopped, Wii Fit U didn't light up the charts, etc.
I think Nintendo's kinda drawn the line in the sand though that they're not going to take huge losses on price cuts to try and kick start the Wii U. If it dies, it dies, but Nintendo isn't going to sacrifice a chunk of their cash warchest for the future trying to save the Wii U via price slashes.