What could iran do? Cry and moan, thats about it. I am sure they would also continue their support of terrorism full steam but so what? They do that anyway. If they try to engage us, they will just lose the military strength that they do have. If they refuse to sell oil, they will starve.

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Qur'an:8:39 Fight them until all opposition ends and all submit to Allah.
Qur'an:8:67 It is not fitting for any prophet to have prisoners until he has made a great slaughter in the land.
Qur'an 8:12 I will terrorize the unbelievers...Strike off their heads and cut off each of their fingers and toes.
Qur'an 9:5 Fight and kill the disbelievers wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.