I'm not sure that CTV could Use 'A ' in the same way that Chek was used because I think the CRTC may be being a bit stricter with it's regulation of 1 channel / market and I suspect that the network probably requires It's regional affiliates to show Canada Am
If they go back to the 6:30 AM start with the re-run of the previous night's 11:30 newscast they could slot a 1/2 hour morning newscast in that time slot.
It looks like Reena will still be with CTV her Bio has been updated to show the change as far as the cancellation of Canada Am Vancouver.
Canada AM gets destroyed by local Global morning shows in Vancouver, Edmonton (10 times the viewership) and Calgary. If CTV stations in major markets outside of Toronto had their druthers they woud dump Canada AM in lieu of a local show in a minute. Only then would they be able to compete.