The Waterbending Avatar

What if Aang also died with the other airbenders?
After that, a century later, a girl was born in the Northern Water Tribe.
The elders discovered that she was the new Avatar.
So when she was 4, she began training and 9 years later, she met 2 siblings, Sokka and Katara.
But also, a prince from the Fire Nation, Zuko.
They are first enemies, but Emma falls in love with him.
Will Emma save the world, or will it be too late?
And will Zuko return her feelings?