The Z's heritage doesn't count for much, we've have Twin Turbo Z's, NA Z's, viscous diff, LSD, convertible. This is the natural progression of a car series in a market dominated more by emissions laws and efficacy than sentimentality.
Nissan can't ignore the power to fuel efficiency of modern Turbo engines as far as emissions and competitive performance is concerned. The hybrid is an interesting idea but many people, myself included question why you'd elevate your 2 seater sports car series to compete with your flagship supercar, the GTR in terms of performance.
I see the hybrid idea falling off the production rollout, but I do hope they do a balls out version with the VR30DDTT from the Q60. That would have the Z in a very healthy position against competing R & RS models.