According to Nokishita, the images, price, specs of upcoming Canon RF 16mm f/2.8 STM lens and Canon RF 100-400mm f/5.6-8 IS USM lens have been leaked online.
Canon RF 16mm f/2.8 STM Lens: (Price: $299)
Canon RF 100-400mm f/5.6-8 IS USM Lens: (Price: $649)
According to the cache on the Amazon product page, “RF100-400mm F5.6-8 IS USM” has a minimum shooting distance of 88cm at 200mm, a maximum shooting magnification of 0.41x at 400mm, and an image stabilization effect of 6 steps (R5 / R6) / 5.5. Stage (R / RP), teleconverter RF1.4x / RF2x compatible, seems to be nano USM.