According to latest rumors on CR, Canon is currently working on a new super RF mount lens: RF 14-21mm f/1.4L USM lens. This will be another “world first” type of lenses from Canon. Last year, we have already see the RF 28-70mm f/2L USM lens (B&H Photo Video/Amazon/Adorama).
Canon already had a patent on this lens last year. According to CR, this lens is currently in advanced development and will likely be one of a couple of world’s first lenses coming for the RF mount next year. The source also said there will be a new crazy prime RF mount lens coming next year. Stay tuned.