Nordic Hockey in alternate, hypotetic pre-1809 historical time line where 20+ million mostly Swedish speaking population of hockey fanatics would fly Tre-Kronor colors, Lol.
Even better if going to times of Great Northern war 1700-1720s assuming decisive Win for The Kingdom of Sweden. In that time line, team's roster would include players from Estonia, Lithuania, Latvia...
"Co-prosperity sphere" of Swedish protestant kings would be about half of Europe with slightly different end result of 30 years war (assuming the king Gustavus II Adolfus wouldn't be killed in Lutzen)...
Nobody write sports fan fiction from alternate historical time lines,- sadly -, but reality wouldn't that simple straight forward either. There would be probably few millions people more living in Finland without those endless centuries of near continuous wars between Sweden and first Novgorod, then Czarist Russia, various coalitions etc. that nearly always were accompanied with famines and plagues, more or less forcibly (usually more) conscripted generations of males generation after generation that fought and died for the king and the country, and sometimes insanely high tax burden for keeping those wars running, vast areas of devastated and depopulated of land at the eastern frontier province...
Ultimately it is likely fortunate thing for Finnish hockey and Nordic brotherly hockey rivalry that Sweden and Swedish border province and dominion called Finland get separated as an end result of Finnish War 1808-1809. From Finnish perspective 1800 was relatively prosperous, peaceful period of time that made possible all kind developments in economy, culture, commerce, population, industry, art... ultimately the Idea of Finnish identity and nationality.
Now we try crush our old big brother in a hockey rink, our front being toward west, our National hockey team named after the iconocraphy of The Coat of Arms of Folkunga...
Sure, indeed, Best-on-best of combined Swedish and Finnish players would be rather devastating unit. On a paper.