What's supposed to be the difference between the Setting, Locations, and the World of Tiger & Bunny categories that necessitates needing all three? If one of them is for things and concepts in general in the world of T&B and another is for places in the T&B world that leaves one that's redundant as the other two already cover everything. I think Locations should be used for places in the T&B universe while either Setting or the World of Tiger & Bunny category should be used for things and concepts in general. Whichever one we don't use should then be removed.