Panasonic will soon have a full line of five fast (f/1.8) prime Lumix S lenses for Leica L-mount (35mm f/1.8 announced, 18mm f/1.8 coming next) - Leica Rumors
Updated Nikon Z mirrorless lens roadmap (a total of 23 Z lenses by 2021) - Nikon Rumors
Sigma E-Mount Lens Guide – SonyAlphaLab
Fujifilm updates X-mount lens roadmap through end of 2015: Digital Photography Review
Sigma rumored to be 'actively working on' RF-mount lens road map for 2020 announcement: Digital Photography Review
Just Announced! The Sony NEX “E” Mount Lens Roadmap – 8 new lenses! | Steve Huff Hi-Fi and Photo
Upcoming Nikkor Z mirrorless lenses according to the latest roadmap (total of 30 Z lenses by March 2022) - Nikon Rumors
Sony FE Lens Roadmap 2022: New Lenses Release Dates
Sigma Announces Two Brand New Lenses For L Series and Sony E-Mount Mirrorless Users | ePHOTOzine