POTENTIAL SPOILER: Is Korra really the last avatar?

I don't think so. I reckon that the re-fusing with Rava just means that, while she can't connect to her past lives, she will be the first in a 秒 wave of Avatars. If that makes sense.

No. I don't think so. If she was the last 阿凡达 the maker's would of 说 so thereself.I think she made a new cycle of Avatars. She is the new 阿凡达 of the new cycle :)

I actually think they made Korra the new "first avatar." I think she's supposed to be paralleling to Wan, 或者 something along those lines. I'm really not sure. The 写作 was very unclear, and the portrayal of all of this was botchy, to say the least. I'm just wondering if there is going to be a Dark Avatar.....even though Unalaq was defeated, because he fused with a spirit, doesn't that start a chain? I'm thinking they are going to have a Dark 阿凡达 and Good 阿凡达 for the rest of the series....and Korra will be the first, starting a new generation of avatars. It's just a tad cliche.

No, like with Wan, I think she'll be starting off a new cycle of Avatars and that will lead to future Avatars being born.

No, because Raava was reunited with Korra making the cycle begin again.