Here is another interview with Canon manager at Photokina 2018 by LensVid. They talked a lot about the new Canon EOS R (B&H Photo Video/Amazon/Adorama/Focus Camera/WEX/ParkCamera) and RF lenses. The interesting part is that Canon manager said that they will be focus on RF lenses, so there will no new EF lenses to be released in 2019 (Which means EF 24-70mm f/2.8L IS will coming in 2020), and Canon promised to release the “holy trinity” of RF mount lenses in 2019 (24-70mm, 70-200mm, 16-35mm, likely be f/2.8). Canon also said EOS R is not targeted for pro shooters, a high-end level EOS R Pro mirrorless camera will have a dual card slot, IBIS, fast shooting speed, 4K Video 10bit 4:2:2 internally and more.
Canon has already announced 4 RF lenses now: They are RF 28-70mm f/2L, RF 24-105mm f/4L IS, RF 50mm f/1.2L, RF 35mm f/1.8 Macro IS STM. And there are already two RF lens patents: RF 24-70mm f/2.8L IS, RF 24-300mm f/4-5.6L IS. Canon already mentioned in their announcement video that they are working on “a series of fast f/2.8 lenses and more”. Which means we may see these new f/2.8 zoom lenses in 2019 to 2020.