I just...I don't even-WW2 doesn't exist without WW1 and the crappy crappy crappy crappy way the Allies handled the end of the war. Not to mention there is no Russian Revolution without Vladimir Lenin getting shipped into Petrograd by Ludendorf to knock the Russians out of the war for good. If Hitler (or 'a' Hitler) had come along without a WW1 and the absolute horror that affected generations of politicians and generals, the 'atrocities' and the idea of appeasement would not have been a likely attitude taken. 

 Maybe an Alt-History where the Soviets are the ultimate bad guy (wait that's C&C) or some weird 'Mythic WW2" like Dinh suggested.