Korra wakes up after her battle with Vaatu. she feels strange. she tried to connect with her Past Avatars. here was none. she realizes her connection to Past Avatars were destroyed in process.
Korra begins to cry, said: "this is my fault.." but a voice said, "no, Korra. it's not your fault. you did what had to be done."
she looks to her left side and sees Katara.
Korra: "Katara!"
Katara: "it's okay, Korra."
Korra: "no, it's not okay! i failed!" "cries"
Katara: "oh, shh.. it's okay.. it's okay.." "hugs Korra"
Katara: "i'll take you to your father now"
Korra: "Okay." "wipes her tears off"