The thing that makes Big Boss tricky is that he is very picture reliant. A Solid Snake-like pic can make him upper tier(I think), while being an old geezer will boost him down to lower mid-card.
I really can't see Big Boss having an old pic in this match.. their rivalry took place entirely when he was a young man so it'd be stupid as hell if he looked old. So I took the Bosses.
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http://www.last.fm/user/VinnyMendoza "This is all we have... when we die.."