Korra and Asami
I was a fan of The Last Airbender series. From the beginning we all see love interests and from simply the first book we get a feeling of our characters. However, This was completely misplaced. This isn't the only show to have done this (kids show or not). I am not against Same-sex relationships. Infact I have a friend who is gay in happily in one (not that it should credit me in any way). If you are going to have relationships like this in a show, you need to give REAL hints, and from the start have it set up. I don't mind if a character is lesbian, or bi-sexual, but please show it. Let the love interest fester, cheap moments of simply becoming closer friends being turned around as an excuse for a "out of the blue" last second ending to make a relationship is simply dumb. I feel it was one of the last things animated for the series (and I don't mean because it is the ending episode. They do edit these all at once, but with certain parts first).
I won't be watching the next series anyway. The Legend of Korra proved you simply leave a good series alone.