Hitler gets adopted.. moves to Moscow.
later on gets deported to Siberia where he becomes a semi famous exile painter and chess player
Hitler getting adopted and moves to Russia isn't going to make him the savior of the rus for world domination.
people are a product of their environments and what they have endured. his sucked, he happened to be a good orator, with some military knowledge. ( albeit, not great, but at least he had balls.. )
if he was adopted, who knows he could have had parents that were more involved or more brutal or what ever. remove him from Austria / germany and you remove his chance at supreme dictator.
Where does his family move him too? Belarus? Ukraine? Russia proper? St Petersburg? Moskva? Kazan? Tsaritsyn?
would he be a communist. that depends. who adopted him? an aristocratic family? He might then be more white leaning. thus he he gets sent to Siberia along with many of the Volga germans or he is killed during or after the civil war.
He could become disenchanted with the Tsar if he lives in St Petersburg depending on his parents makeup and who he hung out with.
He could be a Kerensky Supporter
okay so lets say he decides to go red. yay.. he went red. where does he live? who does he know? you have way to many butterflies here. This also doesn't mean he isn't purged or tossed into a gulag at some point. Sure he could be some local official, he could also have died during the war on the eastern front.
on thing is for certain, no beer hall.. no Nazi third reich .. at least not as we know them.
now this might mean a longer term more stable weimer or a return of the Kaiser or his son or something. This would change or prevent a WW2 as we know it. this might make a more west leaning Germany that wants to partner up with France and England in the face of Soviet Russia or a germany that will align with the soviets and eat Poland up. depends on the day of the week and mileage may vary. Hitler before his political life took off wasn't important to world events.
Might prevent the Airship Hindenburg from exploding..
Germany still proceeds as it did up until Hindenburgs death for the most part.
If you remove hitler from what made him him, well.. you don't have him anymore.