Honestly? LOTR pin would have worked well as a Zelda pin. Unfortunately with how Nintendo is..not sure they'd go for it these days.
Someone made a megaman pin in future pin. It was pretty well thought out in terms of how you handle the multiple bosses, etc.
I agree that any of the above mentioned themes would be ripe for a game now if done properly. Myself, was never a big fan of the SMB pin..seemed they could have done more with it.
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