According to most reviews that I have seen the Nikon 17-35 F2.8 lens is reckoned to match or exceed the corresponding Nikon primes, though performance is said to drop as you approach the point of close focus.
I own that lens, and while it isn't quite
a prime, it's stunning none the less. It's actually my favourite lens. Extremely versatile and wickedly sharp.
It is always possible that Zeiss have outsourced manufacturing to China, in which case the lenses will be price competitive with Nikon. But I doubt that as Zeiss tend to go for the high end of the market.
According to this interview,
the lenses will be produced in Japan in order to keep the costs reasonable.
Not thrilled that they appear to be MF, but curious all the same,
EDIT - Also wanted to say that "Let Biogons be Biogons"
has to be one of the silliest forum alias' ever! Very funny