Well, the title is the question in this case. Considering how badly Nintendo typically executes product launches (the 3DS and Wii U come to mind), how should Nintendo execute the launch of the New Nintendo 3DS?
I really think this should be launched alongside Xenoblade 3DS (it'll take a while to complete, though), or a title like Monster Hunter 4 Ultimate, since they both take advantage of the hardware. They should also whittle down the 2DS/3DS stock while they have a chance to do so, as well. Having just the New line on shelves will really eliminate some confusion. And, I think they should learn to advertise again.
I WON A BET AGAINST AZUREN! WOOOOOOOOOOAAAAAAAAHHHHHHHHHHHHHHHHHHH
:3