Personally, I think what happens in Norway and to Oluf is crucial in such a scenario, does it fall into the hands of Margrete? the sister of Christopher. Or does Olaf grow up and manage to distance himself from his mother. Does he want to? does she even get a regency. So many questions
I still like my idea about Estridsen Cadet-lines in both Norway and Sweden, however, these solve nothing and in time, maybe earlier, maybe later. The Swedish nobility will likely dispose of their Estridsen King. This will likely draw in Denmark, which might or might not be strong enough to place the disposed Estridsen back on the throne.
To put it simply:
Sweden has a strong nobility, that wants a king
they can rule over.
Denmark has returned to a position of strength and is challenging the Hansa for domination in the Baltic. I think the best word to describe it as, would be Opportunistic.
Norway is in a precarious position with likely an underage king that might have died from Brugada Syndrome.
Or at least there is some people that have said that a bunch of Danish kings died of this, I can't comment on the validity of the thing.