Some fact checking. Looking specifically at the EOS R: Street Price last summer was around $1,756. Now $1,729. Is $27 a big drop?Those are big drops for mid-October. We usually don't see those kinds of discounts until Black Friday (or the week leading up to it).
In my experience, the high end cameras (non Rebels) don't follow the traditional Black Friday schedule. Deals can begin anytime from October through December. I assume that is because retailers and Canon both determine pricing based on how much inventory they need to move before the end of the year and what it will take to move that inventory or hit sales targets.
But, the real point of my post was to correct the idea that these discounts "may be signaling new announcements." In fact, discounts are far more closely tied to retailers and manufacturers trying to reach sales targets than they are to new announcements.
If, as you suggest, the discounts are beginning earlier this year (I'm not sure they are) that is just as likely to be a reflection of concern about a weakening economy as it is about impending announcements. In fact, I'd guess it's more likely.