If the Axis had won the war, Germany in the end would be triumphant. After the Japanese won, Asia will under Japanese hegemony and the Europeans under Japanese rule would be killed as Japan would deem such Europeans problematic to the Asian new world order. Germany would not trust Italy as the latter changed positions towards the end of the war. Germany would be triumphant over Europe. The remaining Roma (Gypsies) and Jews would be exterminated. The Slavs of Eastern Europe would be reduced to slave status.
There would be even vaster internment, concentration, and death camp systems. Germany of course will conquer other lands, including the United States. In the United States, Blacks, Asians, Latinos, Natives, and Jews would be reduced to slave status, if not placed into concentration and/or death camps to be worked to death. Yes, it would be BEYOND HELL on earth. One should watch the movie, FATHERLAND and the documentary The NaziWW2 Victory for the grim, hellish scenario as to what would happen if the Axis, particularly Germany had won World War II. Also read the perennial book by William Shirer, THE RISE AND FALL OF THE THIRD REICH; Daniel Goldhagen, HITLER'S WILLING EXECUTIONERS, and Clarence Lusane, HITLER'S BLACK VICTIMS ( the last book was quite an eye-opener).