Canon recently has filed several fast zoom lens patent for Canon RF mount. They are RF 35-135mm f/2.8L, RF 40-150mm f/2.8L, RF 30-110mm f/2.8L. These are just patent, not sure will coming to a real product. Take a look at below:
Northlight Image has just uncovered a patent showing optical formulas for more super-telephoto zoom lenses (RF 120-700mm f/4.5-8 & RF 100-600mm f/4.5-7.1) for the RF mount mirrorless cameras. Since Canon will soon announce the RF 100-500mm f/4.5-7.1L IS USM lens, will these new super telephoto zoom lenses coming to real ? Stay tuned.