Korra is the hero Republic City deserves, not the one it needs!
Korra is a SUPERHERO. THINK ABOUT IT:
(1) She goes to a BUSTLING, TECHNOLOGICALLY ADVANCED MELTING POT MEGA-CITY.
(2) Where she encounters CRIME (it says this in the announcement!).
(3) With a bonus ANTI-MUTANT FACTION.
(4) She has a stylin FASHION SENSE, okay? Irrelevant to superheroes but still
(5) I mean look at the photo! LOOK at it (for the twelve thousandth time today). SHE IS PERCHED PRECARIOUSLY BUT CONFIDENTLY ATOP A RAFTER, BROODING OVER HER CITY.
Korra. Is. A. Superhero.
EDIT: lol at the "Manhattan" mention in this interview.
P.S. Who's willing to bet on the fact that someone is RIGHT THIS VERY MINUTE preparing a Korra cosplay for Comic Con?!