how many years or how long does it take to make a car like this?

yah just sounds like a starving reporter stirring it up to get some cash.

No kidding, the current GTR in performance per dollar is probably the most efficient out of other cars within its performance range. It definite will hold up another 10 years. It kinda reminds me of the 300ZX turbo where it was known as a "Corvette Killer" for a good 5 years.

if it's a revised platform (think 350z to 370z), probably 2 years or less. a whole new platform (think R34 to R35)... much more. to capitalize on the R35's platform development bucks, i'm sure the R36 will be a retrofitted version of the R35's to accommodate the hybrid components. i'm guessing a KERS system like porsche and ferrari are working on. hopefully shed some weight and maybe refine the looks a bit. with KERS, i would expect the next GTR to be in the 700hp range

The current GT-R is an amazing car, and it's still relatively new within a redesigning cycle. Not to mention it's not a regular sedan like Camry or Civic. The cost to develop a brand new generation of GT-R is much higher than regular cars. Hence each generation should have a longer model cycle to begin with. GT-R is legendary, and the current generation has proven to be able to beat other supercars way more expensive than it. If Nissan end up canceling GT-R all together, it will be a shame, and then it's just sooner or later that Nissan will turn into Honda who have totally lost their way.

The next Z is supposed to be downsized anyway to reduce weight and improve fuel efficiency. If Nissan can develop a good 4-cylinder turbo which can produce almost the same power-to-weight ratio as the current Z, it will be a success.

Finally a stock boosted Z!
Cannot wait! :DDDD