So instead of leaving him a prisoner of heavy depowered power armor with a bum pacemaker, a magnetic disruption cold possibly leave him naked as well? Any break in that magnetic field could leave Stark open for some serious hash settling.
When? I’ve got an issue where Force takes out Iron Man with an EMP. IIRC It takes Iron Man some 15 minutes to get his armor back online.
Back To The OP
I’d give a short fight to Stark. If Doom has time to strategize and out think Stark, he wins.