The Skyline is here now. The G35 is the Skyline In Japan. What we don't have is the GTR version. Right Now there is no GTR, and Nissan is deciding what the next generation GTR should be. The two schools of thought are a VQ35DETT (Twin Turbo V6) or a VQ45DE (NA V8). It was a sad day last year when the last of the RB in line sixes rolled of the line.
As far as the GTR Coming to America, Nissan did say it would, and the new car would be built to meet World Wide Standards.