I can certainly imagine a fantasy scenario where someone with enough capital to buy controlling interest could compel CN shareholders to sever and devolve the Sarnia-Montreal segment of the company, just by threatening to seize control of the entire company. Perhaps under that kind of threat, the shareholders would see reason to tolerate one less freight-prioritised corridor in exchange for the someone keeping their mitts off the rest of the system (which I agree is generally better run by private investors than by government, especially respecting the cross border implications).
If that were done, it might be possible to secure a better passenger route likely sub-HSR but at much lower expense than Alto's budget. And even if one did buy out all of CN, most of the rest of its network could be arbitraged to recoup most of the original spend.
That kind of "grandiose threat to get what you want" strategy seems to be working for some people south of the border, but I doubt anyone up here has the necessary predatory mindset or deep pockets to pull it off. It certainly seems that spending that much money and stirring up that many hornets to gain control of a continent-wide asset, just to secure inroads in one corridor, is a sledgehammer to drive a nail proposition. Like I said, a fantasy scenario.
But that brings us back to Alto being a really monumental proposition, with good reason to question whether it can be successfully built as a public sector enterprise by our lacklustre governments, comprised of politicians and bureaucrats who can't help being themselves.
- Paul