43- Dude, it's fan pandering. They're trying to get the Zutara fans excited so they will watch. They did the same thing in the finale trailer last year with the cave scene between Zuko and Katara. Katara is huggy. It makes sense that once she reconciles with Zuko, she'll hug him. It also makes sense they'd fight together, as there is a good chance Aang will fight on his own. It would suck if Katara still held a grudge towards him at the end of the series. It's great that the trailer showed that they will indeed, become friends. But it's nothing more. That's all it showed. You don't need to worry. They are not going to throw away the pairing that's in the "DNA of the show" to develop a new relationship in the remaining six episodes of the series. There's no way it could even be developed without it being rushed and crappy in such a short time.

Plus if you watched tBR, I think Maiko is pretty safely canon now.