Yeah, I would hate Soviet - like Russian old general Kozlov

General of India, or Africa, or Brazil (!) - this sounds interesting. General Kozlov sounds cheesy
Personally I hope Austronesia... sigh... Polystralia will include Indonesian Archipelago. It is insane for me to imagine almost lone Australia (22 millions people currently + few millions people of relatively minor population of Oceania - just 16 millions! And remember, sea levels are rising

) being powerful enough to oppose such giants Panasian Cooperative, African Union or USA
Yeah yeah 250 years in the future... But Australia 200+ years since colonization still has only ~22 million people - while USA has 300m, Mexico 120m, Brazil 200m and even Canada 35m. Why? Because most of Australia is extremely hostile to human inhabitants (famous 'Australian terrifying animals'

) and it is hard for me to imagine Australia being demographically on the same level as even Franco - Iberia. And as I said, Oceania has relatively tiny population.
On the other hand - Polystralia constisting of: Oceania + Australia + Indonesia + Malaysia + Philippines?
Indonesia is even currently, with pretty poor population, world 10th economy, and it is quickly rising. 240 million people. Geographically close to Australia. Next to it - Malaysia, much smaller but on the other hand pretty rich and developed. Next to it - Philippines, anomaly which doesn't fit anywhere, currently poor but 250 years in the future?...
Currently such confederation would have over 400 million people. This is impressive.
Yeah Australia is mainly English. But it is very diverse country as all countries of this area. Hell, I did quick research - out of 22m inhabitants of Australia ~10% is from Asia. And in next 250 years Asian percentage in Australia will definitely rise
By the way, how in Earth it is possible that Australia has 2 millions of Asian immigrants while far cold Canada has 5 millions of them? o_o