My theory for where the sevens havens are going to be

Okay first I know I'm going to be wrong. I remember reading somewhere that Korra terraformed the world so the map will probably be different. But I think some locations could potentially become the havens or havens had been built on the ruins of this places.

-The Swamp: This is the one that I'm most confident about. Spirits seem to be really involved in the plot, so I think the swamp would be fitting for exploring the relationship between spirits and humans.

-Republic City: We have to see what Korra has done, so I think there's a pretty good chance Republic City has a huge anti-avatar mentality.

-One of the Air temples. I have seen a lot of people complaining about how air benders are not monks. But I would like to see one of the air temples becoming this kind of monastery, kinda like how it was during Aang's time. I imagine a huge tower high up in the montains.

-Ba Sing Se (I would honestly prefer Omashu, but this seems more likely): In the trailer we see a group of people with Earth Kingdom symbols riding Air Bisons. So I would imagine we are going to see someone clinging to the Earth Kingdom identity.

-Underwater: I just feel like if a storm is hitting the world and you could go underwater you would. This is the most unlikely one.

-Ember Island: No reason. I just think it would be neat.

Of course if anyone has other theories feel free to share them.