The next version of an international council needs actual authoritative power. There’s no point if someone just decides they don’t want to listen and will do whatever they want. Veto power should be curtailed if a supermajority of countries are in agreement otherwise a bad actor will push their weight around.
The UN was built by the countries that defeated Fascism, under the theory that if they were in charge permanently, we would never see a Fascist threat again. Little did they know the new Fascism was coming from inside the house…