From: Davenport, Iowa
Well, the whole of the maps would need to be updated with changed resources, factories, rail lines, and cities.
In addition, the armed units would all have to be modeled at perhaps brigade size to give the player something to do. If corps size, the US would have, say, 6 army corps and 1 marine corps.
Finally, there have been no serious 1st world interstate wars since WWII that could be modeled using the WiFFE scale, maps, etc. This is due in no small part to the presence of nuclear weapons.
I don't think it is likely to be viable.