Okay, my memory's a bit rusty in which episode I noticed this, but I really want to say it's in one of the Siege of the North episodes. Anyway, I remember that they played the 'Four Seasons' song that Iroh sang in the background while focusing on Sokka. I had wanted to post this a while ago, but I kept forgetting. By now, I just know that they played the song with Sokka in the picture. The Four Seasons song said, "Winter, Spring, Summer, and Fall. Four seasons, four loves. Four seasons for love." or something along those lines, correct?
Basically, I think that Sokka's going to have a 'love' from each nation. The seasons symbolize elements, so why not? We already have:
Water: Yue;?????? Earth: Suki;???????? Fire: Ty-Lee (maybe);?????? Air: ??? (Not so sure about how that'll work out)
Any opinions? If anyone knows where this occured, can you please tell me? I'm positive I heard it, and it's been bugging me rather badly that I can't remember. So...is my theory possible?