Chapter 1: An Intriguing Discovery.
One day in Amity Park Danny was in his parent's lab getting ready to explore the ghost zone, a few weeks after he and the other ghost saved the world from the asteroid, when gets a visit from a strange ghost…
"Are you Daniel Fenton also known as Danny Phantom", asked the strange ghost. Danny noticed that this ghost was old, had a long white beard, road a dragon, and had a red cloak.
"Yes", said Danny, "Who wants to know"? He was preparing to give this guy an ecto punch if he didn't explain soon.
"I am Avatar Roku and I am one of many spirits of the same body called the Avatar and your friend Clockwork sent me to get your help", said Roku, "You world and mine are in grave danger…"
Meanwhile deep in the forest Aang and his friends are camping for old time sake while on the journey of a lifetime to help bring more peace after Ozai's defeat…
"AHAHAHAHA", said Aang as he woke from a frightening dream. He decided to meditate to regain control of his emotions, he could feel danger but he didn't know where it was going to come from. All of a sudden he was in the avatar state talking to a spirit he'd never seen before.
"Hello Aang I am Clockwork and I am from another world and I need your help", said Clockwork.
"Hello Clockwork, what is it that you need", said Aang.
"You world and mine are in danger"
"What type of danger, and why do you keep changing forms?"
"The type that would leave them both never having been in existence and I am the ghost of time so my form fits to show that I am every age, from young to old"
"So what do I have to do to fix this situation?"
"Well as we speak your past life, Roku, is speaking with a young hero from my world to team up with you and your friends to help the fight"
"What happened to our worlds, why is Roku talking to him instead of me, how do you know Roku, I WANT ANSWERS NOW!" Aang was beginning to panic so Clockwork knew he'd better he better explain fast but he couldn't help but hope that Roku had an easier time talking to young Daniel.
Back in Fenton Works Roku begins to explain what Clockwork told him…
"Clockwork told me of how you gathered all those ghost to stop that meteor from hitting Earth"
"Yeah so, what does that have to do with your presence in my parent's lab?"
"Well that sent a great deal of spiritual and ghost energy into the air as did a corresponding event in my world"
"What event was that?"
"Well, a few weeks ago the same amount of spiritual energy went into the air in my world when Avatar Aang used an old spirit technique to take away someone's bending." Roku told Danny that Clockwork said that that's when their planes of existences collided because the energy was so great that they combined and drew their universes closer together and that if it wasn't fixed soon then both worlds would collapse in on themselves.
"Collapse in on themselves?" asked Danny in shock
"Yes our plane were never supposed to meet, they weren't parallel to each other they are unstable, they'll fade from existence and also he said he saw you, your friends, Aang and his friends all defeating the two greatest evils known to both our worlds and helping restore balance."
"I can handle any evil from my world but who's the greatest evil your world has ever seen."
"She is a young teenage girl", said Roku, "She is to be taken very seriously because she is ruthless, manipulative, and very dangerous. She works by controlling those around her with fear."
"That's what makes her dangerous?"
"Yes, Clockwork said the reason he sent me to find you is so that I could tell you about my world and prepare you for the trip, and were running out of time."
"But before I begin I must tell you her name", said Roku
"What is it?" asked Danny
"Her name is Azula"
Meanwhile back in the forest Aang had just heard the same news from Clockwork and was asking similar questions…
"Who's the great evil of your world?" asked Aang.
"Well he was once defeated by our young phantom, he's an older, more evil version of our heroically young phantom." Said Clockwork, "When he was defeated by young Daniel, he was thrown outside of time but when our planes of our existences collided he was freed from the prison he was kept in and he has seen what he can do if he finds your greatest evil."
"I think I know who our great evil is and we must stop him from teaming up with the evil phantom"
"Actually Aang your great evil is a girl."
"Wait you don't mean?"
"I do, Dan Phantom and Azula are going to team up to take over the world."