I see a lot of quite wildly different expectations about price. I think two things are worth bearing in mind:
1) Canon tends to think and plan as a whole - so it will likely have to "fit in" to some scheme - if there is am R6 soon for example that allows Canon to keep the R5 higher price and spec.
2) The market these days is more volatile and technology hype drives things. Add in that this is a new mount that Canon is going to want to recoup R&D and I suspect two things follow - it will be very expensive on launch - bloggers, youtube unboxers and let's be honest those of us with GAS who despite all the evidence believe better cameras will improve our photography! - will buy it without quibbling too much on price. Canon would be mad to not milk that cash cow.
Secondly, Canon will rapidly bring it into line with competitor pricing. Sony has been aggressive with pricing its products, keeps older ones available as budget options (a tactic learned from smartphone makers) and just relentlessly keeps bringing down prices on cameras to entice customers. I expect you'll see Canon do likewise, it might start out higher but Canon won't have a situation persist long where it is being undercut substantially by Sony's A7R IV. Just look at the L lenses in RF mount, unquestionably expensive on introduction but already many of them are down to similar prices or just slightly higher than the Sony GM equivalents. A little patience will likely be rewarded with this new camera I think!