The New Union, I think. When the late Soviet system fully revealed itself to be truly unsustainable by the late 80's, Gorbachev proposed the USSR to be reorganized into a supranational union not too dissimilar to a stronger version of the modern CIS: the Union of Soviet Sovereign Republics, or the "New Union". Russia, Ukraine, Belarus, Azerbaijan, Kazakhstan, Turkmenistan, Uzbekistan, Kyrgyzstan, and Tajikistan all supported it, while Moldova, the Baltic states, Georgia, and Armenia didn't. It was nearly put into effect: it was planned to be signed on August 20, 1991, and ratified later in the year, but the coup of August 19 threw the entire thing into the trash and ultimately resorted in the Belavezha Accords that saw the USSR dissolved by Russia, Ukraine, and Belarus. Even after the coup, the only countries that supported post-coup independence were Ukraine and Azerbaijan.
The map would look something like
this. Artsakh
might be more robustly independent: but given how the USSR (and later Russia) reacted to Chechnya's declaration of independence, I doubt it.
For another idea: what if Japan never abandons Taisho Democracy and creates an alternative to the Greater East Asian Co-Prosperity Sphere that's more like the EU or Commonwealth? I could see that spreading into Indonesia, Malaysia, Thailand, Burma, India, maybe even Sri Lanka and depending on how a surviving Japanese Empire influences the Indochina Wars, Vietnam, Laos, and Cambodia?