They already did that with Oubliette in the Marvel Boy mini. It's the same as Jack Kirby's original idea for Dr. Doom--that one day we'd see Victor's face and it would have one little scar on it from the explosion. But Stan Lee established that the sight of Doom's face could drive someone insane, so that was out; John Byrne later tried to resolve the two by redoing the origin so that when Doom saw the little scar, he told the monks that forged his mask to put it on him red-hot.