The Legend of Korra - Book 2: Spirits

 Spoiler

Tumblr just pointed out a VERY, VERY interesting fact.

After Ravaa, the one who was holding all of the elements, is ripped out of Korra, she's not a water bender. She's an airbender. Thoughts? Rewatching the last episode, and she does in fact use Airbending at 6:36, when jumping into the tree of life with Tenzin before she goes all blue-giant.

 Spoiler

Not necessarily an Airbender, if anything we know Korra is NATURALLY a Waterbender, were she not the Avatar, same as how Aang was naturally an Airbender. We know this as fact because of the way the Avatar line passes on between the elements.

We know that Wan (and everyone else) gained bending from the Lion Turtles, but later on in Aang-times, we know that people are born with bending powers. So it stands to reason that the Avatars are born with all 4 bending powers, and that it is part of them, rather than a result of having Rava inside them. Hence why Korra is still able to use all 4 elements after losing Rava. Rava's only involvement is the spiritual connection and the avatar state.

EDIT: Ninja'd!