I presume the OP is referring to waiting for an RF-S 11-22mm similar to the EF-M 11-22mm, and not an RF 11-24/4 similar to the EF 11-24L.
Given that the RF-S 18-150 comprises the optics of the M18-150 in a new barrel with a new mount, an inexpensive, variable aperture RF-S 11-22 is a reasonable expectation.