Canon has already announced six new RF lenses that coming in later 2019. Now according to CR, a new RF lens Canon RF 14-21mm f/1.4L USM lens is rumored to be announced in 2020. This will be another world first lens similar as already released RF 28-70mm f/2L USM lens (B&H Photo Video/Amazon/Adorama).
Canon already has a patent on this lens in late 2018. According to source, a new crazy prime lens is also coming in 2020. Stay tuned.