Canada has no large scale vaccine production capacity so even if they could license the production they couldn't produce any decent amount any time soon.
So if there is a need for a new vaccine, we can likely deploy it with a shorter interval to availability and much larger initial volume.
We can also become more disciplined. We don't need to go all the way to a strictly enforced lock down to improve on the social distancing that we've done the last year (at least, not in the US). And we can try to get people to more widely accept contact tracing/tracking.
I'm saying there's reason to be optimistic that we will be able to respond successfully even if the current vaccines don't end the pandemic (and it likely would be reasonably quick too, our tools are much better now than 12 months ago).
At some level of production capacity, convincing people in high risk areas to social distance and convincing people to get another vaccination are the hard parts.