Bear in mind we still don't know what the NX is. If it's somehow continuous with the prexisting hardware, as one of the images seemed to weakly suggest, it's quite possible the later Wii U games will be used as "launch titles".
I really don't care at this point, I only care that it's coming to the Wii U as that's one of the main reasons I bought the console. The odds of them cancelling it for the Wii U are extremely small I'd say, given how much work they've put into developing it on the platform.