One of the lenses that Canon will announce in the near future that hasn't been on our roadmap is a Canon RF 24-50mm f/4.5-6.3 IS STM. I think it's safe to assume that such a lens will be very small and very light. The price should also be on the lower end of the line-up
Expect an imminent announcement for this one.
We know of more products being announced, but we haven't nailed down the announcement date.