My wife is Hungarian and she told me that she had an argument with a guy who suggested that if Hitler had won, Hungary would have been in a great position. But considering what I have been able to find about the general plan east it seems that the Nazi’s didn’t care much for Eastern ethnicities. That being said I haven’t found any evidence that Hungary would eventually end up with the same fate as Poland and Czechoslovakia. Did such plans exist? And if so how commonplace was the knowledge of them?
There isn't any evidence that Hitler had plans to resettle Soviet territory(as i am guessing, that is what you are referring to) with any other axis member population, nor did Romania, Hungary or Croatia wished this.
However, at the Second Vienna Award, Germany accepted Hungary's request to be given at least part of the territory lost after WW1 in the Trianon Treaty which included most of Transylvania (then part of Romania) , part of Slovakia and Yugoslavia, while Bulgaria was given southern Dobrudja, conquered by Romania after the Second Balkan War. In exchange Romania was promised the recovery of Bassarabia, annexed by the Soviet Union in 1940 as part of the Ribbentrop-Molotov pact as well as Odessa and the surrounding territory, part of the Ukranian S.S.R.
Finland was only interested in getting back it's territory lost in the Soviet-Finnish war that ended in 1940 and ,even the start of the war, was reluctant to push further than it's old borders, even after many german requests.
Now that I read your question again, i realize that you meant to ask if the Nazi party had any plans to resettle it's own allies. While Hitler did kept it's allies on a short leash, especially towards the end of the war and would have likely kept doing so after the war ended, there where no plans to resettle satellite countries with ethnic germans. Keep in mind that, while Slavs were regarded as "sub-human" by nazi doctrine, Hungary and Romanian are different ethnicities and, while being considered inferior to the aryan race, where somewhat higher on the Nazi racial hierarchy, Romanians being on about the same level as Italians, given their common Latin roots.
As for Hungarians, they were tolerated but due to their non indo-european language were scientifically not aryans. in 1935 Germany changed the term "aryan" in official state documents and used "person with german or similar blood" instead, partly to suck in its finno-ungric speaking allies (Finland, Estonia, Hungary).
So in short : Hungary and Romania would have wound up as puppets or vassals of Nazi Germany, similar to the satelite states of the USSR, but there were no plans for them to be integrated into Germany or be resettled by ethnic Germans.
As for the question if Hungary would have been better if Germany won : it depends on whether you want to live under a fascist dictatorship or a communist one, either way i would say it's a lose/lose situation.