It could be possible. The main questions should be, It could be cost effective for the costumers? Market? How much people would pay for it? It will be in a competitive price vs aftermarket TT kits?
Definitely, all question could be Yes. People will be glad to pay for a 370z TT that would be covered under Nissan Warranty, maybe in a price range close to a 40 to 50K (at the most). That will, obviously, put in a rocket the reputation of Nissan, it will put the 370z in a level that never could imagine. 1) GT-R, a brutal performance car that is in a "affordable" range, putting Nissan Brand Name in a upper level scale with Ferrari, Porsche, Lamborghini, etc... Maybe not to many people consider the GT-R an exotic looking car, but anyway. 2) Nissan 370z TT, will put another sight of Nissan capabilities to the extreme at a well costumer concern value. Now lets put Value Engineering at work, Material Testing, etc...
I think, that if this car is built, the GT-R would be the most affected. So I believe, everything with the 370z with a TT V6 is possible, but it will not, in my opinion, affordable to build for Nissan because of the GT-R at the market, unless they build a new engine for the GT-R, a V8 4.5L already developed for the 350z Xanavi, But again, it will increase in who never know in what level the price of the GT-R, probably...
But who knows, they also have a fully built platform with a VQ30DETT V6, so they can continue from there.
I think that is the same issue happening with Mitsubishi, Eclipse vs Evolution (I don't know much about this issue, so if I am wrong, feel free to correct me
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