A particularly grim world would be one where Soviet Russia and Germany ally and win world war 2, and take the lands spelled out for each other in the Molotov-Ribbentrop pact.
Germany gets all of Europe up the Curzon line in it's sphere (evil European Union) and Russia gets all of it's OTL conquests.
So this except Sweden and Finland are also Nazi.
Russia declares war on the Britain and invades India and Iran from the north. With both the Red Fleet and the Kasiermarine putting the stranglehold on Britian and the Crown Jewel of the Empire in Russian hands Britain capitulates.
Japan and America are too busy fighting each other to contest either Germany or Russia.
So there, two super powers. They'd probably also support rival factions in China and post-colonial India, so you get cold war style proxy wars as well.