I highly doubt any of this is true. Firstly, when the NX was mentioned back in March it sounded a lot like it was still in the conceptual stage, and hardware of any kind had not been started on. Secondly, I seriously doubt they could ship 20m NX units in the first year; Wii barely did that much in its first 12 months, and there were shortages.
As for games, I can see some moving to NX, but not all. I am probably one of the people who is confident that Zelda U will be on the Wii U only. Based on this game's history (the tech demo being used to decide on hardware for Wii U, for example), it makes no sense whatsoever it will be moved to NX. Being a launch title might be possible, but I can see Zelda launching on Wii U long before NX is released.