its RF 28-70mm F2 L USM pro lens. However, the rumored Sony lens is tipped to go wider while also offering a constant f/2 aperture, being 24-70mm, and becoming one of the best Sony lenses ever.
For general shooting and maximum versatility, a zoom lens will win every time against a prime. Looking for ultimate quality is something else, but with zooms as good as the Nikkor Z 24-70mm f/4S ...
The new RF 16-28mm F2.8 IS STM comes with image stabilization, weather sealing and STM autofocus.
although pretty good for a zoom lens, and of course correctable. We can measure -2.59% barrel at 24mm, changing as we zoom to pincushion with +0.53% at 35mm, +1.81% at 50mm and +1.87% at 70mm.