My guess 2 GTR versions
World GTR:
Engine: 4 - 4.5 litre V8 Quad Cam, Direct Injection
Power: ~300kw
Gearbox (i believe there will be an option of): 6speed manual, 6-7speed sequential Paddle shift, or CVT
Drive: 4wd (possibly electric motor driven)
Body: Aloy guards, suspension arms, boot and doors, Carbon or Carbon Kevlar bonnet, front and rear spoiler & diffuser, air deflector and some internals trim pieces
Price: $150k
Japan & Maybe Europe:
Engine: 3 - 3.5 litre V6 Quad Cam, Direct Injection, twin electonic assisted turbos
Power: ~300kw
Gearbox (i believe there will be an option of): 6speed manual, 6-7speed sequential Paddle shift, CVT
Drive: 4wd (possibly electric motor driven)
Body: Aloy guards, suspension arms, boot and doors, Carbon or Carbon Kevlar bonnet, front and rear spoiler & diffuser, air deflector and some internals trim pieces
Price: $120k
I think what is important to remember is that this car maybe a World Release.
This could mean two things.
1: The burdon of production may be spread to more than one factory
2. The Current production method and components would have to be similar to those already in use. I doubt they are going to engineer an entire new motor just for the GTR. It is an important fact to remember that the previous GTR was VERY expensive to produce (By memory was one of the many reasons nissan nearly folded). I doubt they are going to make that mistake again. So you should expect the VQ or VH Engine family to be used. Sure they may vary the capacity and add a turbo or two, but it will still be designated a VQ or VH engine.
I would like Nissan to go to the extent of having an entire production line just for the GTR, where they trial new production methods & techniques. God knows it has been long enough since the last GTR ceased production. But i doubt it.
A world wide release would indicate that Nissan may want to use the V8 for markets like Aust, USA, South America & possibly the Arab Countries where the majority of potential target buyers may prefer a V8.
Countries like Japan & Europe may prefer smaller capacity engines like a V6.
my 2c based on opinion only. absolutely no fact(s)