There is nothing meaningful along the old ROW.
Now.... do you want to talk about putting the old Canadian back, but through SSM and North Bay, as well as extending the Ocean to Toronto and the Canadian to Montreal? Before you do,I recommend getting another beverage.....
No arguing that; I was just pointing out that saying a rail line between two points still exists by utilizing a completely different route that ultimately and circuitously connects them is a tad disingenuous.
As to second point, I do not. As far as I'm concerned, Canadian exists primarily as a tourist service with a little bit of inter-city a remote service thrown in. Snaking a trans-continental service so it touches as many bases as possible would just degrade it even further. Now, I admit that, personally, if they shifted it back to the CP route in northern Ontario I would ride it in a heartbeat (to TBay and back).
Pax rail service to and between northern cities should be considered on their own merits, not dumped onto Canadian. I stand to be corrected, but when Canadian serviced Montreal, it operated as a section via the Ottawa Valley, which joined with its other section from Toronto in Sudbury.
On the same note, I'm not sure I see the benefit of extending already long routes, providing (and this is a significant caveat), lay-over times and connection are reasonable. Sure, as a tourist service, it might be a good marketing angle to be able to go coast-to-coast with one change, but there are better ways around that. If that is the end goal, why not a Halifax-Vancouver Canadian?