this is a HUGGGGGE stretch but imagine if it outsold Gold/Silver! Thats Some Major Accomplishment. Pokemon Z should be coming out 2015 holiday and hopefully that sells well too
As I said, I see a huge marketing push for the game. I also see a big push for Pokemon in general because Nintendo will want to rely on the series to help both the 3DS & Wii U. Neither one is selling too well, not only when compared to DS & Wii but also GB/GBA & N64/GC. 3DS sales have been increasing but they're still are nothing special, Nintendo knows this.
The fact that they are releasing it at the same time WW is very telling IMO. They have something going on. As for Pokemon U? I expect something more than Ramble. I see a full retail NFC game that will at the least make Nintendo buckets of money.
I could be wrong, and I know it's unlikely but I see very big things for it.