This is a possible scenario. If they only called in the 25,000 notes that would cut out about (my guess) 99% of foreign investors. I have been looking at smaller denominations if I buy more. The smaller notes (within reason) might be safer. Which notes will they stop at? The $500 is the first without three Zero's. You would have to have 20 100 note stacks to equal 1 million Dinar.
And if they do that, what's to stop them from thwarting profits on electronic accounts?
http://www.dinarbanker.com/iraqi-dinar-currency-info/iraqi-dinar-redenomination-and-exchangeability.html