OneWorld has only itself to blame for losing a Canadian partner. They had the opportunity to save Canadian but declined to do so...unlike Lufthansa and United's efforts a few months ago when Onex was beckoning.
Most industrialised nations have at least one partnership....
UK - BA-1 world. BD-Most likely STAR.
Australia - QF-1 world. AN-STAR.
US - AA-1 world. UA-STAR.
Japan - NH-STAR. JL-Most likely 1 world.
Looks like Canada is losing out again.