Iron Man is just a title. He's doesn't use much iron in his armors anymore from what I've heard. If the bit of iron left in Stark's suit is enough, than he might just win - that's if Kurse doesn't get his hand on Tony first.
Doesn't really need adamantium. His forcefield makes the armor virtually indestructable, unless it runs out of energy. The armor is completely demagnetized, so I don't know whether or not there is any iron or steel present in the armor.
Well ask Ultron. The guy has adamantium bodies hidden every where. He's also got loads of secondary adamantium. Next time the Avengers beat up Ultron, Stark ought to get a hold of it and make a suit of it.
adamantium Iron Man.... nah.... he'd be too tough then... maybe secondary adamantium.... for special occasions (like.... maybe he has to fight Hyperion) ... but have some stupid explanation as to why he doesn't use it all the time.... power fields causing physical illness or something