That's the thing, it was unexpected; it was character development. He does something other than murder, for the greater good rather than his own desire. He could fight his way out of Hades anytime for revenge, but in his own words, his revenge is complete. I guess they could go the Misery's Return route and do something really creative, but it has to be good or even the Annie Wilkes-tier fanboys won't like it.
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"God Hand is the ultimate expression of the joy of humanity, specifically the punching part of the joy of humanity."-Shigeru Miyamoto