The thing with the Nissan Z is that it is so far removed from its original form that people have started losing interest in it. The Nissan Z got a lot of attention when it was first released because of how nimble and fun it was to drive with each upgrade, the Nissan Z got a little bigger and bulkier and the last Nissan Z was so different from the first model that you would not think that they belong together.
The fans are saying that they would like to see Nissan bring out a new Nissan Z model but only if Nissan make it nimble and light once more. Some people were hoping that the Nissan would build the Nissan Z based on the Infiniti Q60 model.
While Nissan has never indicated that they are working on a new Nissan Z, some people believe that they are. What they are worried about is that the Nissan Z is not going to be what they want.