Look the 240z and z32 are gone and they aren't coming back. Nissan suffered through horrible sales in the 90's in part because their designs grew stale and boring (Z32 and 240sx were the exceptions). Remember the Z was dead in the U.S. The 350 brought the Z back to life with successful sales. If the 370 is a hit then the Z will continue to evolve and maybe someday it will take a form you will like better.
Although I don't like everything about the 370Z I will hold my final opinion on it until I see it and drive it. But I do like the way these photoshop images make it look: