That speculation was more than idle day dreaming. One of the more cogent arguments against Quebec separatism was that it could lead to a dissolution of the Canadian Confederation. With the Atlantic provinces being virtually forced to seek admission into the United States to maintain economic viability. I know there were serious discussions among United States think tanks about how such situation could play itself out. I think both the New York Times and Washington Post had articles about such a scenario as did the Economist, if I am not mistaken.
One of the conclusions was that Quebec would be much smaller than it is today because the first nations would not agree to remain in a French Quebec and rump French Quebec would find itself more isolated linguistically than they are today.
Having travelled to Quebec last fall, I had discussions with numerous Quebecois and found no interest in raising the separatist issue again.
Btw about those so called Canadian pacifists, I think someone forgot to tell the Canadians in the NHL.