Taking into account globalization, the US’ current status as the world’s debt mule, the dollar’s current situation as a reserve currency, etc., etc., is the Mar-a-Lago Accord the fever dream it seems to be?

Link to the Wikipedia article, because there really isn't any official outline on this, since the current administration seems to be trying to keep this under wraps.
https://en.wikipedia.org/wiki/Mar-a-Lago_Accord

I read through this, checked out some of the related materials, and I really can't imagine how this could be implemented without the value of the dollar dropping to a record low, and the international institutions, both economic and financial, losing a common method for consistent valuation. I'm not even going to think about what could happen to currencies pegged to the dollar, and the impact those currencies bottoming-out could have on their counterparts.

Could such a plan be implemented (assuming he could actually unilaterally implement it)?
Best guess for immediate impact to international commerce (if any)?
If the IMF were to start using like the Bancor, could they mitigate the impact of this kind of economic policy?

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Edit
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Yes, this is my personal sanity check. I have a habit of thinking ahead and assuming the worst. Bad habit I'm aware.
Still, I really don't think it's too much of a leap in logic to assume that if the value of the dollar (currently the closest thing to a universal currency we have) shifts too much in a short period, it could cause lots of interrelated dominoes to fall.
I should also state I'm aware that many economic powers are attempting to move away from the US dollar as their main reserve currency, but that takes time. Another counterpoint will likely be that most institutions move from USD to GBP, YEN, or EUR, but I don't know how much they're trusted by the international institutions. As for the Yuan, China is infamous for manipulating their currency's value.