The timing of the 370 onto the market in 2009 was a commercial disaster with the financial climate at the time, and I do wonder if Nissan have targeted markets for the 400 where spare money is more available in a shrinking market for petrol guzzlers.
Europe and the UK in particular have clearly put their marker down that non-fossil fueled cars are the future, no doubt prompting Nissan to not be bitten again, with the writing on the wall that anyone other than true sports car enthusiasts (and those with more money than they no what to do with ) are likely to risk forking out their hard-earned cash on something that will be increasingly tax targeted.
As nice as twin turbo V6 might appeal and no doubt the final detail renderings will react to initial feedback from the teasers released, my head will, sadly, not let my heart yearn for another Z given a combination of the financial climate and the green agenda.