SamuraiBlue
Captain
The real question to ask here is not whether dollar would be replaced as a reserve. It's whether US dollar's reserve status would be supplemented with other currencies. Any international deals, settlements without the use of US dollar reduces it status as reserve.
Wrong question since the reason behind creating a reserve is to maintain reliability and stability of of your own currency since most all nation utilizes Fiat money system. Why?
To make transaction of natural resources on the global commodity market and to do that you need US dollar so you need to exchange your currency with US dollar on the international currency market. If your currency lacks reliability and stability then banks providing the US dollar will place a premium to ensure within a calculated risk they can gain profit.
For example NK wants to buy a certain item on the global commodity market. To do this they need to exchange their currency to US dollars. Do you think traders will accept this transaction without some reliability to their currency?