There are already rumors previous that Nikon will release cheap Z-mount lenses in the future. Now Nikon confirmed in their Nikkor Z brochure that Nikon will also release cheap non-S Z-mount lenses at a later date.
Lenses other than the S-Line series will be announced at a later date.
Well-balanced, high-performance lenses
These lenses strike an optimum balance between advanced functionality, compactness and value for money, while retaining the basic concept of the S-Line series.