The reasons why Doctor Doom wears a mask have changed throughout his Marvel comics history, but here are the main ones.

The Marvel Legends Series Doctor Doom Roleplay Helmet set ... Donning the famed iron mask to hide his disfigurement, Doom is ...

That surely goes a long way to explaining why Downey Jr strode onto that stage in Doctor Doom costume to say, "New mask, same task." Dr Victor von Doom, also known as Doctor Doom, is one of the ...