I have no idea.
Deep beneath the city of Ba Sing Se:
"There's too many" whispered the young avatar as he looked from Katara to the hordes of Dai Li and the Prince and Princess of the Fire Nation. Knowing what he had to do he earthbended crystals around himself and tried to open his final Chakra.
Katara looked tearfully up at the glowing form of the avatar as he entered the avatar state, not noticing Azula, the Fire Nation Princess sending a large bolt of lightning through his chest until it had struck.
Lewes college, the town of Lewes:
Sat in the common room, five teenagers sit laughing and joking. Marc, fair haired and blue eyed suddenly goes quiet. His arms dropped by his side, spilling his water over his rolled up denim shorts. Georgia's the first to notice, water splashing against her tanned leg.
"Marc? What was that for?" she asks, noticing Marc's blank eyes "hush up guys".
Ally, the short dark haired teen, Zac the well built young man and Bekah, her usually smiley face suddenly turning serious as they all notice Marc's sudden change. "wha-" Zac blurts out as Marc's eyes suddenly glow a bright blue and the surrounding college disappears from around them and they find themselves falling through bright blue light....
Deep underneath Ba Sing Se two days after Aang's defeat:
Zac's the first to wake, his black hair dishevelled he wakes up inside a giant room. "there's no windows, no lights, so why can I see?" he says to himself. That was the point he realises his four friends were all lying on the floor, apparently unconscious. Remembering what had happened in the common room at college he rushes over to Marc, checking his eyes. They were back to his normal blue.
"What the fuck? Where are we?" the sudden question from Ally taking Zac completely by surprise.
"Oh good, you're awake." Now turning to look at the bewildered looking girl "but to answer your question, I have no idea."
Two sharp intakes of air make Ally and Zac jump. Looking around them they see Georgia and Bekah gasping for air. "guys! Thank god!" Ally exclaims, leaping at Bekah and hugging her more tightly then she'd hugged anybody before.
While being helped up by Zac, Georgia looks down at Marc "What happened to him back at college?...his eyes, i'd never seen anything li-" her eyes drawn to two dark shapes moving across the cave, she immediately stops talking. Noticing her sudden silence they all look in the same direction.
Two men in dark green cloaks were calmly walking towards them. Without realising what they were all doing they all took a stance, the two men saw this and started to attack. Before they knew it, the four teens had started to move. Bekah had jumped 7 feet into the air, sending a wall of air into one of the men. At the same time Zac sent two fireballs in the other man's direction. With both men on the floor Ally and Georgia leapt into action, the former bending the earth underneath one of them so he was completely swallowed up, the latter bending the water from one of the nearby streams and turning it into ice crystals, imprisoning the second man.
Unnoticed by his four friends Marc stood, watching the action unfold. As the two men were captured he speaks up "Wow, when did you guys learn to do that?" looking completely bewildered they all say in unison "I have no idea"