Oh there will still be a turbo engine but it will be in a diesel or a tiny K series car that only has barely over a liter of displacement. I'll summorize the article on pg 249 in Options mag for you. By the build numbers and years for several car that are confirmed dead models.
JZA80 sales totoals in Japan per year
2001- no numbers available from Mazda
Compared to a van that Honda sells in Japan
It says that the turbo engine is dead because of requirements to come out this year in Japan for emissions which are said to be even harder to pass then the CA requirements. Even Diesel trucks will be required to buy some $800 cats to put on and keep on. So it will be hard enough to pass a 3.5L V6 can you imagine trying to pass a 3.5L twin turbo model? Renault decided that there isn't enough of a market to justify the making of a GTR anymore and if you look at the sales numbers it does shed some light on as to why Nissan was bought out and almost filed for bankruptcy. If the GTR ever comes back it will be in badging only in the US. It will likely just be a RWD (GTS-T) with a V8 in it and a GTR badge. Kind of like the Toyota Soarer is in the US. In Japan its a Toyota Soarer with a 2.5L six cylinder twin turbo RWD but in the US its a Lexus with a V8 and a A/T. The only cars that are likely to hang around in turbo form are going to be the Evo and the WRX for now. Also even NZ is going to require modifications to cars coming from Japan to meet new standards.