The weekend question... I'll try my best
got a question which german dialect is dominant now in germany, is more prussian?
That is kinda hard to answer. The dominant dialect is technically hochdeutsch, a form of elocution that is not natively spoken anywhere, but cultivated among the middle classes. Hochdeutsch allows for a variety of accents, and here, the northeastern and northern variants are the most prestigious (so yes, more Prussian in that Brandenburger accent is more prevalent and raises no eyebrows). Outright dialect, though, is a more complicated issue. There is more of it around without the massive impact of WWII, but it is less accepted in polite company. There are differences here, with some dialects considered acceptable higher up the social scale than others. Basically, lower-class people are extected to be speaking local dialect. People in customer-facing jobs must understand Hochdeutsch, and the educated (most whitecollar workers and graduates) are supposed to speak it. A rolling Baltic drawl or the twang of Hamburg Missingsch is still something people will accept as charming local colour. Bavarian's slow umlaut-ing less so, and the softened consonants of Saxon are right out. As is even the slightest hint of a Polish accent, by the way.
Also whats going to happen to German australisia the pacific islands and papua new guinea?
I'll have to think this through in detaiol because it is not an easy question at this point, but in broad terms I expect New Guinea to become independent while the islands may well retain some kind of protectorate or overseas territory status. Colonialism will end, and Germany will divest itself of its holdings more easily than Britain or France. So there is not going to be a big fight to keep these places (there will be violence in Africa).
German colonial rule is generally not good for New Guinea or the Pacific. The metropole is distracted and distant, infrastructure investment underwhelming, and economic development limited to resource extraction until the 1960s, when tourism begins to be a thing. There are a few scattered prestige projects like the navy base at Tulagi, the aerodromes at Saipan and Apia, the phosphate terminal at Nauru or the Hochlandbahn, but on the whole development depends on access to the sea. Small islands do all right, though underfunded German colonial rule encourages the development of extralegal power structures that will serve the places poorly in the future. New Guinea remains stuck in premodern economic and social structures that don't really change until the twenty-first century.
Have poles started to become more intergrated i.e. more upper class poles, generals, officers and admin.
The answer to that is a resounding no. But not because of anti-Polish racism.
Basically, if you are a Prussian of Polish ancestry, the act of considering yourself a Pole defines you as non-integrated. If you are integrated, you are not a Pole. there are hundreds of thousands of Germans with names like Kowalski and Nimmersein, officers from senior noble families and intellectuals of high renown whose ancestors spoke and felt Polish. They are not considered Poles.
There are equally men in Prussia who proudly speak Polish, embrace their identity and the flag. People like Prince Radziwill, wealthy and powerful, and far more people in villages and towns throughout Silesia and West Prussia. These people are not integrated and they consider themselves Poles. they are socially a breed apart, and though there are a few wealthy and powerful people among them, their standing in German society is tenuous.
A lot of these people accepted the offer the new Polish state made of granting them citizenship. Many emigrated to a place friendlier to their language and culture. 'Prussian Polish' identity is gradually declining into a pride of ancestry.