Here is an updated list of rumored/expected cameras and lenses that could be announced in the upcoming months - we should expect some major delays and even cancellations for some products:
Cameras
Leica S3(announced)- Leica M10-R (more Leica rumors)
- Zeiss ZX1 (?)
- Sony a7s III (?)
Olympus E-M1 Mark III(announced)- Panasonic GX10
Fuji Instax Mini 11(announced)Fuji X-T4(announced)- Pentax APS-C DSLR camera
- Sigma full-frame L-mount mirrorless camera (delayed, delayed again)
- Sharp MFT 8k camera
- Affordable RED 8k camera (could be connected to the 8k Sharp camera above)
- RED Komodo compact camera
- DJI mirrorless camera
- Nikon Z8 (see all rumored Nikon products)
- Many Canon rumors: APS-C mirrorless, 8k mirrorless, PRO mirrorless, EOS R5, EOS R6, 75MP mirrorless and 100MP mirrorless, PowerShot G9 X Mark III
- DJI rumors
- Yongnuo YN450M
Lenses
- New Venus Optics lenses (also for M-mount)
- New Yongnuo lenses
- New Viltrox lenses
- New Meyer Optik Görlitz lenses
- Sigma 70-200mm f/2.8 FE lens
- TTartisan 50mm f/0.95 lens
- Rumiere Noct-Master APO 75mm f/0.95
- New Pentax K-mount lenses (Pentax D-FA 50-300mm f/4.5-5.6), two Pentax full-frame teleconverters, and HD PENTAX-D FA★ 85mm f/1.4 lens (see also this post)
- Tamron is working on 6 more new lenses for Sony E-mount, will announce 3 new lenses in 2020
- Two new Nikkor Z mirrorless lenses (announced)
- Olympus 500mm MFT lens
- New Tokina lenses
Olympus M.Zuiko Digital ED 12-45mm f/4 Pro lens(announced)