These Iron-clad behemoths decide to meet up in Siberia and end up getting into an argument over who the best Star Trek captain was. Things get out of hand when they start unleashing their full arsenal on each other. So, who ends up getting the honor of being able to call themselves Iron Man's second greatest villain.
Round 1: Original versions of both.
Round 2: Current versions of both.
Random encounter both rounds, win by kill, incapacitate, or BFR.