I think that for a while, ISOMs wouldn't be sold in the US, because I think there would be a big legal backlash.
I think all the formerly-Cuban cigar families that had their brand names, factories, fields, etc. stolen from them (such as the makers of Romeo y Julieta, Partagas, H. Upmann, etc.) would take legal action against the Cuban government for the loses they suffered.
Then, when all the dust settled, they'd probably be priced cheaper and would lose that aura of mystery around them.