Why, why, why would you go to such lengths for this?
Heres the deal, it's catch 22. If you never get to see the MC's face, you'll always wonder...'what did he look like, man I want to see that sooo bad!"
But then, when you see it, you look at it and say 'that sucks, it's nothing like I imagined" Theres NO face that could live up to the Master Chief.
Everyone has their own idea of what he looks like under that helmet, and each person's idea is a little different. If they were to EVER show the MC's face, it'd dissapoint the majority of the fanbase.
Why do you ask for things which you could not comprehend?
Of course it would be the bomb if it ever dropped, but it'd destroy all the mystery and fascination with the character. For all those of you that are begging to see the MC's face revealed in H3... thanks. They probably won't show his face until they kill him off.
Why de-mysticize your hero... why do you need to see his face? His face is the helmet, and thats all you need to know!