No. No, no no.
First of all, what does Kane do now? Job, but still gets the pops he deserves and the wrestlers he puts over gain from it. If he gets his mask back, he'll just be demasked by the next wrestler he puts over. Which won't take long at all.
Secondly, Kane doesn't need to be dominant. Dominance goes for the monster heels or faces that need dominance to get over, or it comes as a by-product of being higher up the card for a long time.
Kane is over to the Nth degree. Not only does he not need to be dominant to get pops, he is always considered dominant over any mid-carder he's feuding with. Maybe not to the IWC, but to the crowd he'll always be considered a contender. You could put Kane against Cena tomorrow, and the crowd would still think Kane had a chance. I guess you could say that means that Kane is dominant to the crowd. I dunno.
Third, the mask isn't what gave him his dominance. It was the fact that he steamrolled through competition. He could come back tomorrow and start rolling through wrestlers and everyone would think he's dominant. Everyone is fallaciously implying that the mask brought the dominance. It was the other way around.
Remasking him isn't going to do anything but make a shitty storyline with probably Morrison that will end up with Kane unmasked again.