Nikon updated their Z lens roadmap with silhouettes of upcoming Nikkor lenses - Nikon Rumors
Nikon: NIKKOR Z Lens Roadmap is Updated (2019-01-07) for the Next-Generation Nikon Z Mount System's Full-Frame (Nikon FX Format) Mirrorless Cameras – Photoxels
Nikon Plans to Introduce 50+ Z Mount Lenses by 2025 | CineD
Alleged roadmap leaks 10 new Nikkor Z lenses set for 2020, 2021 release: Digital Photography Review
Nikon Z Lenses | 5050 Travelog
The best Nikon Z lenses in 2023 | Digital Camera World