When making very niche products, the most important thing is what the target audience want, not what you think they want.
And the best part is, Nissan doesn't need to bleed money to make this happen: everything is already developed in house and being produced, so the economy of scale naturally brings cost down, all the fixed costs have been amortized. There's nothing that stops them from putting a 13-year-old VR38 in it and make a Z Nismo.
Toyota had to go through all the hassle of developing a product and setting up production and distribution overseas just to save a bit of money while completely missing out on economy of scale. And Toyota has to beg BMW to allocate them a few hundred S58s to make a GRMN.
The Zupra is a great sports car and the Z will unlikely match it in every aspect imaginable. But the Zupra program is a poorly run project. Some say TMC has too many accountants. But I think they have too few good ones that actually understand finances.