Canon has been quite aggressive in the development of RF mount lenses, releasing some extreme designs, such as the RF 28-70mm f/2 L USM and the RF 85mm f/1.2 L USM. They seem to have no intentions of slowing down, as another boundary-pushing design has emerged in a recent patent.
The patent features multiple f/1.8 lenses, the most impressive of which is a 150mm f/1.8 design. Such a lens would be an extremely wide aperture for such a focal length and would start to encroach on the sort of designs we see in 200mm f/2 lenses. Currently, the consumer lens with the longest focal length and an aperture wider than f/2 in Canon's lineup is the RF 135mm f/1.8 L IS USM, which has been generally described as superlative. So, despite the impressive design, I doubt they plan on bringing such a similar lens to the market. That being said, I suspect that at some point, we will see a 200mm f/2 lens (or maybe even 200mm f/1.8 if the company wants the bragging rights). Such lenses are popular for indoor sports, close wildlife, and extreme portraiture. Even though we likely won't see a 150mm f/1.8, it is nice to see the company continuing to push the boundaries of design.