Yes. You and Wan were successful in stopping Vaatu, trapping him in the Tree of Time but the two of you were bonded. Humans left the backs of Lion Turtles after Wan separated the Spirit World from the mortal realm by closing the portals with most of the spirits on the other side but peace still wasn't obtained.
When he died at the end of his time the two of you were reincarnated into an Air Nomad. A cycle was created that we began to call the Avatar. As time went by people forgot that the two of you were trying to bring peace not just between humans but also between humans and spirits. They forgot about you and Vaatu, most of them anyway.
So when the next Harmonic Convergence came around the Spirit Portals were opened again and a man, Unalaq intended to bond with Vaatu. They succeeded. You and Korra, the most recent reincarnation, fought them but they were too strong due to the war Unalaq had instigated in preparation. They ripped you from Korra and destroyed not just you but the bond you shared with her and all of the past lives. When Unalaq and Vaatu began to attack one of the human cities, Korra managed to fight them off while trying to find light in the dark. I sensed it and brought your light back into the world which allowed Korra to pull you from the darkness and defeat Unalaq and Vaatu by purifying the Dark Spirit. Before Harmonic Convergence was over, you and Korra bonded once again.
The Spirit Portals remain open so that humans and spirits can try to live together peacefully. [It's not perfect yet but they're working on it. There are more Airbenders to try to help bring that peace about now.]
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When he died at the end of his time the two of you were reincarnated into an Air Nomad. A cycle was created that we began to call the Avatar. As time went by people forgot that the two of you were trying to bring peace not just between humans but also between humans and spirits. They forgot about you and Vaatu, most of them anyway.
So when the next Harmonic Convergence came around the Spirit Portals were opened again and a man, Unalaq intended to bond with Vaatu. They succeeded. You and Korra, the most recent reincarnation, fought them but they were too strong due to the war Unalaq had instigated in preparation. They ripped you from Korra and destroyed not just you but the bond you shared with her and all of the past lives. When Unalaq and Vaatu began to attack one of the human cities, Korra managed to fight them off while trying to find light in the dark. I sensed it and brought your light back into the world which allowed Korra to pull you from the darkness and defeat Unalaq and Vaatu by purifying the Dark Spirit. Before Harmonic Convergence was over, you and Korra bonded once again.
The Spirit Portals remain open so that humans and spirits can try to live together peacefully. [It's not perfect yet but they're working on it. There are more Airbenders to try to help bring that peace about now.]