I say 120-150 million. Why do I think it will sell less then DS. Simple their is more competition. NGP isn't the only competition that will steal Nintendo market share the I-Phone , I-Pad, PlayBook , PSPhone etc...etc... will all begin to eat away at the handheld market.
I think Nintendo DS will outsell 3DS by up to about 20-30 million simply due to more competition. Don't consider phones competition well Apple considers Nintendo competition and Nintendo for sure thinks like wise. I think with gaming becoming more popular on I-Pods, Phones and tablets it will no doubt eat away some market share from Nintendo.
However I still expect 3DS to sell way better then PSP did this gen and the 120-million mark is low enough that I am pretty sure it will be above it.
-JC7
"In God We Trust - In Games We Play " - Joel Reimer
