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The best thing about Z5 is that it so well disguised that there are virtually no clues to how it will actually appear.
But close up photography shows such details to reflect its now intentions. Such as very low nose and wide kidney grille.

But yes Z5 will be a serious sports car. It will have a Carbon content that will shame high end sports cars as well as a weight advantage. Hence why a soft top roof has now been adapted.
A benefit of pooling resources between BMW and Toyota in which costs shared over materials allows increased implementation.
The car exercises a very light and minimalistic cockpit, important for a sports car but still current with modern technology and luxuries.

Of course as for this car engines will be familiar,but the outputs will be exclusive and a manual will be available for the more enthusiastic driver.