The idea here is that electrification could wait until the entire right of way was built to high speed standards, except for in the cities where commuter train networks would benefit immediately from the electrification. Although, there could be a rationale for electrifying from Montreal to Ottawa first. Much of the right of way on a combined CN Alexandria Sub-CP Mainline alignment is dead straight, and barring this, the terrain through here is very flat.
One thing that is really important and thing should be looked at now is the standardization of voltage for trains along the Windsor-Quebec corridor. Is there a standard voltage? It would not be ideal to have to modify engines after the fact.
Here is what I am thinking in terms of staging:
1) Electrify key commuter rail lines in the corridor (Georgetown/Kitchener, Lakeshore, Veaudreuil)
2) Upgrade Build the track between Dorion and Kingston to 300km/h+ Standard
3) Electrify track from Ottawa to Montreal
4) Upgrade/Build new track from Kingston to Toronto, Montreal to Quebec to 300km/h+ Standard
5) Electrify from Ottawa to Toronto
Another open question: between Toronto and London which cities should a Windsor-Quebec High Speed line hit? Hamilton? Kitchener?
My own thoughts on how it should be phased.
1. Ensure that any work required to run HS trains on Toronto and Montreal inner city networks is started. I would also include an upgraded line from Hamilton to Niagara Falls that could support speed of 200 km/h (the maximum for classic lines). This phase would also include a Pearson to Kitchener HSL segment and a MCC to Hamilton HSL segment. These two would be the first to operate and would be ideal for testing equipment, infrastructure and services before larger parts open. Pearson would have a station modelled on the Schiphol station and line.
2. Toronto/Montreal/Ottawa triangle. The route would essentially be the same as currently exists. A line along the lake and river from Toronto to Montreal, a line from Brockville to Ottawa and Ottawa to Montreal. It will erve the most people and there could opportunities to increase service too. With the exception of the Ottawa to Montreal line, which could possibley open earlier, it would all open up at once, saving the trouble of operating two different services along some routes.
3. Kitchener to London and Hamilton (really Aldershot) to London. Serve all existing communities along the way. May seem redundant having two routes to London but both serve a lot of people in between and are pretty much equally valid. At this point Niagara to Toronto service with HS equipment on an upgraded line would have begun.
4. Montreal to Quebec. Could open before the above phase but given the known soil difficulties it may just take more time to build. North shore route serving Trois Rivieres plus perhaps Jean Lesage airport (its along the way anyways and not off the path, possible suburban station) and perhaps one or two Montreal suburban stations.
5. London to Windsor. Not challenging but least important segment. Connections with the US could be considered but that is tough to say with so many factors at play.
I wont debate specific corridors, there are o many factors at play to determine them and the general public doe not have access to kind of information to realisitcally determine them.
Also, there would likely be multiple phases to how trains enter inner cites (though very little if anything would change in Ottawa...at least for some time). Toronto for example would probably start with an HSL connecting with Lakeshore somewhere east of Oshawa. In time another HSL segment could be built that would bring trains in on their corridor as far as the Stoufeville line then using that commuter line, saving time by cutting 20 or 30 kms of slower, commuter rail use. Some trains could still use Lakeshore offering access across more parts of the city.
And yes this plan is super comprehensive and includes service to a lot of places, but, with proper planning and design it could still be done for a relatively reasonable amount and for not a lot more than what far less comprehensive plans have proposed.